Couldn't think of a project that was more doomed to fail than a competing alternative to Node.js, but glad that I gave it a shot when I needed to create lots of stand-alone scripts to process text files and SQLite DB updates which I was able to create with TypeScript, bun:sqlite [1] and bun $ Shell [2] working OOB without needing to manage any configuration files or local npm dependencies.
I've since tried it with new JS/TypeScript Projects which also makes use of its built-in Bundler [3] and testing support [4], installing deps is also instant. Having everything work OOB, fast, are real quality of life improvements where Bun has now become my first choice for any new JS project.
[1] https://bun.sh/docs/runtime/shell
[2] https://bun.sh/docs/api/sqlite