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Six topics, one lens: the cost of the tools you build and buy.
Vercel
Deploy errors, ISR quirks, and platform pricing decoded.
Next.js
App Router, caching layers, and build failures — working fixes only.
Electron
Updater 404s, code signing costs, and desktop packaging.
Billing
Subscription fees, per-user walls, and real invoice math.
Database
Neon, Postgres limits, and query patterns that survive scale.
Hardware
Prices, supply chains, and the money math behind the silicon.