Computational biology PhD turned UW-Madison professor Sebastian Raschka launched Ahead of AI on Substack in 2022, publishing monthly deep dives into LLM papers and architectures. Four years later: 200K+ subscribers, zero sponsorships, and a book-newsletter flywheel that proves low frequency and high depth can win in a crowded AI newsletter market.
Former Twitter/Apple/Zynga engineer Alex Xu self-published System Design Interview in 2020 and hit the Amazon bestseller list. In 2022, he and ex-Discord engineer Sahn Lam launched a Substack newsletter that crossed 26K subscribers in month one and hit one million in two and a half years. From book to newsletter, YouTube, and paid platform, ByteByteGo reached $3.5M ARR in 2024 with a 26-person team — all fully bootstrapped.
Former Mastercard AI engineer Avi Chawla turned a cancelled US master's admission into a daily Substack newsletter — 150-word visual posts on data science. 10K subscribers in 5 months, income exceeding his full-time job, 200K+ subscribers and a paid course platform four years later.
Berlin-born, Melbourne-based designer Kai Brach spun his indie print magazine Offscreen into Dense Discovery, a weekly curated newsletter. Eight years, 403 issues, 36,000 subscribers, 63% open rate — deliberately not scaling, sustained by a single $649+ sponsor slot per issue and a Friends membership program. Proof that 'enough' is a viable business model.
Former Airbnb product lead Lenny Rachitsky left in 2019, wrote a viral Medium post, moved to Substack, and built a 1.2M-subscriber newsletter empire through obsessive quality (50+ revision cycles per post), a 40K-member Slack community, a top-ranked podcast, and an annual summit — all without hiring a single full-time employee.
Alex Lieberman started a PDF called Market Corner in his Michigan dorm, rewriting Wall Street Journal-style news in a casual, conversational tone. Five years later, Morning Brew hit 4 million subscribers and $13M in revenue, then sold to Insider Inc. for $75M. Their referral program accounted for up to 75% of new signups at its peak — one of the most successful growth engines in newsletter history.
Former investment banker and startup VP Packy McCormick turned a COVID-era social club pivot into Not Boring, a long-form business analysis newsletter. In two years he hit 100K subscribers and $1M in sponsorship revenue, then extended the flywheel into three venture funds totaling $68M+ across 200+ investments — proving that writing can literally be deal flow.
From Stratechery proving in 2014 that one person can make a living writing analysis to TLDR hitting $10M+ ARR in 2024 — ten newsletter cases distilled into four revenue playbooks, three content models, and one universal rule: format choice determines the ceiling.
After six years managing Uber's payments infrastructure and witnessing pandemic layoffs, Gergely Orosz launched The Pragmatic Engineer on Substack. It hit #1 in tech within four months, crossed one million subscribers in three and a half years, and generates $1.5M+ annually — entirely from reader subscriptions, with zero ads or sponsors.
Ben Thompson launched Stratechery full-time from his Taipei apartment in 2014 with a three-tier subscription model. Twelve years later, he has 40,000+ paid subscribers, $5M+ annual revenue, and created Aggregation Theory — the most influential business framework in tech analysis since Clayton Christensen. Substack's seed-round pitch was literally 'Stratechery-in-a-box.'
Sam Parr went from selling hot dogs in Nashville to building a 1.5M-subscriber business newsletter, then sold it to HubSpot for eight figures. The buyer didn't want the content — they wanted the mailing list as a SaaS lead funnel.
Dan Ni — Yale math-econ grad, former Jane Street quant trader — left Wall Street after a rare medical condition, and launched TLDR from his parents' basement in Missouri with $50/day in Reddit ads. Eight years later: 13 verticals, 7.2 million subscribers, 22 fully remote employees, and eight-figure annual revenue — all from advertising, not a cent from readers.
From the free We Work Remotely to the elite 3%-acceptance Toptal, seven platforms each serve a different niche — job boards (FlexJobs, WWR, Remote OK), startup talent (Wellfound), community (Remotive), market research (Working Nomads), and premium freelancing (Toptal). All friendlier than competing on price at Upwork.
An elite-level engineer applied to over 300 jobs and failed every one, because the interview guides told him to stand his ground and have a backbone, and he read that as being hard-nosed. The interviewers' read: this is the 10x engineer, and I don't want him anywhere near my team. This lecture also gives the best criterion anyone has offered for vibe coding — technical debt.
Put drone jobs back into the five-layer supply chain and the picture clarifies: Layer 2 belongs to mechanical and electrical engineers, while Layer 3 — flight control firmware, sensor fusion, RF, edge AI — is the real entry point for software people, and also exactly the layer Taiwan is short on. But check the scale first: 267 companies and NT$12.9B of 2025 output means far fewer openings than the news volume suggests.
TEDIBOA has grown from 50 founding members to over 260, but since 1 July 2025 you must first be a full member of the Defense Industry Development Association before you can even apply. R&D grants under the Industrial Innovation Platform cap out at 50% of total project cost, three concurrent cases per company, three years maximum — and explicitly ban red-supply-chain components while requiring joint cybersecurity lab testing. This piece covers only what public documents can actually establish.
PX4's own architecture docs say the companion computer runs Linux because 'Linux is a much better platform for general software development than NuttX; there are many more Linux developers.' That sentence is the entry point. The three transition paths differ sharply in friction — CV and MAVLink work on the companion computer transfers almost directly, flight controller firmware means learning RTOS and work-queue constraints, and estimation and control means quaternions and Kalman filters.