Choosing a Package Manager: npm, Yarn, pnpm, or Bun?

I used to just npm install everything without thinking twice. It's what every tutorial used. It came with Node. Why question it? Then I started working on a real backend project and I actually had to think about it. So here's what I figured out about picking a package manager: 🔹 npm The default. Works everywhere, zero setup friction. If you're starting out or on a team that already knows it, there's honestly nothing wrong with npm. The industry uses it more than people admit. 🔹 yarn Came in when npm was slow and messy. Introduced lockfiles properly. Still solid, especially yarn berry with PnP. But its edge has gotten smaller as npm improved over the years. 🔹 pnpm My current pick for new projects. It uses a shared store so packages aren't duplicated across projects. Faster installs, less disk space, and strict by default so no phantom dependencies sneaking in. 🔹 bun Insanely fast. It's a runtime and package manager in one. Great for solo projects and experiments. But team familiarity and ecosystem maturity are real concerns when you're working in production. The question I kept coming back to though: what if you inherit a codebase on npm but later realize pnpm or bun would have been a better fit? Honestly I would not migrate mid-project unless there is a real pain point. Slow CI builds, disk pressure on a monorepo, phantom dependency bugs creeping in. The migration cost has to justify the gain. But on a new project? I'm picking intentionally now, not just going with the default. Senior devs, how do you make this call on real teams? Do you migrate or just stick with what's already there? #nodejs #typescript #webdev #backenddevelopment #javascript

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