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AI's Power Gap Is Four Years Wide

AI's Power Gap Is Four Years Wide

How the nuclear deals announced to solve AI's electricity problem arrive years after the data centres that need them switch on.
John Karpentar Opinion 5 min read
YC's Biggest Batch Sells Scaffolding

YC's Biggest Batch Sells Scaffolding

How 235 startups at Y Combinator's largest Demo Day reveal that AI's second generation is building the substrate, not the app.
John Karpentar Startups 5 min read
Top 7 Robotaxi Companies in 2026

Top 7 Robotaxi Companies in 2026

Which robotaxi companies actually run driverless paid service in 2026 — Waymo, Baidu Apollo Go, Pony.ai, Tesla, WeRide, Zoox and Wayve, ranked by real operations rather than announcements.
John Karpentar Roundups 13 min read
Harvey's $15.5 Billion Compliance Product

Harvey's $15.5 Billion Compliance Product

How a legal AI company nearly doubled its valuation in six months by selling capacity, not efficiency, to the billable hour.
John Karpentar AI 5 min read
Apple's Foldable Is a Silicon Play

Apple's Foldable Is a Silicon Play

How the iPhone Duo's real news is not the hinge but the A20 Pro — the first high-volume phone chip on TSMC's 2nm node.
John Karpentar Big Tech 5 min read
Cognition's $48 Billion Coding Bet

Cognition's $48 Billion Coding Bet

How an autonomous coding agent nearly doubled its valuation in four months — and what a 53x multiple assumes about the future of engineering work.
John Karpentar Startups 6 min read
Top 7 Fusion Energy Companies in 2026

Top 7 Fusion Energy Companies in 2026

A guide to the private fusion companies that are actually building hardware — for investors, energy buyers and engineers tracking who is closest to putting fusion power on a grid. Funding, sites and milestones verified as of September 2026.
John Karpentar Roundups 13 min read
Top 7 Stream Processing Platforms for Real-Time Data in 2026

Top 7 Stream Processing Platforms for Real-Time Data in 2026

A buyer's guide to the platforms that process data in motion — for data engineers choosing between a managed Kafka-plus-Flink stack, a lakehouse-native pipeline, and a streaming database. Pricing and feature details verified as of September 2026.
John Karpentar Roundups 13 min read

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