The problem is there isn't one runtime env, there are many. On top of that, being implemented in at least two different environments is a prerequisite to get f

The problem is there isn't one runtime env, there are many. On top of that, being implemented in at least two different environments is a prerequisite to get finalized as a standard per the tc39 process. I agree with you when it comes to things that aren't far along- the decorator goat rodeo is a good example, but on the whole transpiling is essentially a part of the process now.