I used all four in real projects. One wrecked a monorepo at 3am. Another saved my ass in production. Here's the unfiltered truth about every major package manager in 2025.
I ran all three package managers on the same Next.js 16 + strict TypeScript monorepo with Shadcn/ui and Radix UI. pnpm wins on disk and CI — but there's a real compatibility cost the migration guides never tell you about.
navigator.clipboard.writeText looks trivial until your app silently breaks in production with zero visible error. I found 4 cases the docs never mention: insecure context, lost focus, revoked permissions on iOS, and React timing. Here are the real patterns with copyable code.
Copy Fail hit #1 on Hacker News with 977 points. I reproduced it in my Next.js stack and found something the viral post never mentions: when the clipboard fails silently during a password or token copy, the user has no idea. That's not a UX bug. It's a human error vector with real consequences.
I scored 98/100 on Lighthouse and axe on juanchi.dev. Then I asked someone who actually uses a screen reader to try it. What happened next embarrassed me. A perfect score and a real experience are two completely different things.
32 years in the dev trenches. Here I write what I learned, what I broke, and what nobody tells you in the tutorials.
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