It makes me sad, because they demonstrated JavaScriptCore is shockingly better than V8 for node-likes. The Typescript compiler (which like basically any non-trivial typechecker is CPU bound) is consistently at least 2x faster with Bun on large projects I've worked on.

When Typescript finishes their Go rewrite that will become irrelevant, and I rather have the compiler from the same people that design the language.

For that example sure, and admittedly the entire JavaScript/TypeScript processing ecosystem is moving in that direction. But the TypeScript compiler is not the only CPU-bound JavaScript out there.

There are plenty of memory safe compiled languages to rewrite that JavaScript into.