I think there will continue to be es-next stuff that can be made available - im hoping that one day we will get macros in TS so we can experiment with new featu

I think there will continue to be es-next stuff that can be made available - im hoping that one day we will get macros in TS so we can experiment with new features/syntax and a compiler is a great way to do that. But even if all of that does go away, types outweigh writing without types imo - but you can always take the output of TSC and stop using it going forward, its not obfuscated.