To call TypeScript, a very strong type system which compiles down to terse JS with no extra JS for even complex types, and thus accordingly removes the need for all sorts of tests, "toolchain bloat" is a fairly one-dimensional view of things

Edit: I accept the downvotes for my tone and have updated it. However, I do feel that by the exact same argument "toolchain bloat" exists, surely one could seamlessly argue "testing bloat" exists, and it should be transparent from the popularity of TypeScript that it's a good tradeoff