The good news is that we can still write our Scala `val`s and `var`s (`const` and `let`) in the source code, enjoying good scoping and good performance.
Is that still true? Early versions of V8 would do scope checks for things that weren't declared with var but it doesn't do that any more. I think const and let are lowered to var representation at compile time now anyway, so when the code is running they're the same thing.
Usage of Scala itself is less shiny if you look at market share. But I believe it's still growing in absolute numbers, only quite slowly.
Wow! 4 out of 20 total ain't bad!
Jocking aside the starting set (Scala developers) is already small, so it's not like either it or even less Scala.js is going to be a major player anytime soon.