Bun has replaced a massive number of tools and dependencies from our stack and really counteracted the tooling explosion that we were forced into with node.
Isn't this more-or-less a self-inflected wound? Who forced you into working with node?
Attempting to replicate even a modicum of this in lower-level languages can be a real struggle. Rust is definitively the least-worst in this respect because there's been a concerted effort by the community to provide stable packages that do most things. But Rust is a complicated and unapproachable language. Using other low-level languages like C/Zig, and you immediately run into issues of libraries and static linking. And even if you find a library, its documentation is either lacklustre or outright missing (looking at you libuv and libxev respectively).
The amount of manual setup and third-party builds-system finagling just to: 1) run a TCP server; 2) fetch data over HTTP; 3) do both of these using a single event loop (no separate threads); 4) use SQLite for storage; and 5) have all this produce a single self-contained executable. Yet I cannot understate how trivial this is with Bun.
Exactly, bun is killer. The test runner is extremely fast.
I can build apps with 1-5 total dependencies and everything just works, and works incredibly fast.