Offtopic perhaps, but if most of your code is in Swift or Kotlin, have you tried the new Kotlin frontend support? I don't have any project where I can use Kotlin in the backend right now but I've always wanted to give the Kotlin frontend a go as an alternative to TypeScript.
I haven't, mostly because none of my front end web projects feel large/complex enough to justify the extra overhead (probably wouldn't even be using TypeScript if it were any more involved than running `tsc --watch` in a terminal window). Might look into it for future projects though.
