Why do people use bun? Would like an answer from an actual experienced / staff tier or higher engineer.

Simplicity.

bun file.ts

And it’s been this way for years.

Don’t care about what’s in a package.json file or if there is one. Can do this without tsconfig file as well.

Also this works on node too now, don't sleep on node improvements

How is that better than Deno?

Really? This was like a intern level response lol

I'm no staff+, but the tooling (package manager and TypeScript runner) is very fast.

bun run is <1s for my projects, while watching for file changes. So the iteration speed is quite pleasant.