What ever happened with continuations in Scala? A lot of people were excited about them back in 2009, but if I google them now I still only get pages from 10 years ago. I haven't used Scala in a very long time, so I stopped paying attention to any changes in the language.
as far as I can tell scala concurrency basically boils down to a few different subclasses that have some overlap:
1. streaming/observable focused like Monix
2. IO effect type like Cats Effect and ZIO
3. Twitter futures/Stdlib futures which are different from each other in some crucial ways
