Hey! Yes, the scopes support is still in progress for Kotlin/JS sourcemaps, it wouldn't help with debugging coroutines from day one - the main reasons which are currently on out radar are:
• Properly handle inline functions frames
• Make a better glue between generated parameter/variable names and original ones
Scopes proposal has a great potential across different use cases. We'll see how it goes and decide what we can improve in debugging experience next! Debugging experience is one of our priorities in the upcoming months.