I have been using this feature to remove the transpilation step during development for a rather large monorepo that makes extensive use of very complex types and haven’t noticed any errors whatsoever at runtime.

You’re downplaying this quite a bit. Node being able to execute TS files slashes a lot of tooling in half, especially during development when you want to modify files and retry in quick succession.

Besides, I’m not so sure this cannot be expanded in the future to adopt validation features before stripping the type information. For now it solves some major pain points for a lot of people.