Dude, rust already being used in production in several places (outside browser engine), some are being published publicly (you could see it in rust friend page), some are being kept as a private works.
- rust => basically, it's not new for me, I've done several small toy project with it, but I want to create bigger project with it.
- ruby => not new again, doing it only for work :((
- scala => this year will be quite interesting year for this language since its library adoption for 2.12 are still on going and who forget about dotty anyway ? Full stack development (frontend + backend) will be quite interesting
- typescript => I already try this, but still not getting anything quite done yet, sometimes it's still a bit awkward in getting some development tools working. It has some issues in getting js library working together since some js libraries weren't that friendly with typescript. (frontends)
I think std means standard collections, not custom ("special" case) collection library. People may look for this kind of specialization in outside std or create their own library. Or you could start be the first one who create this extended collection std.. CMIIW
how about SMT support for ocaml(multicore) ? Could it catch up to the current implementation (HEAD) or it's still in the process of moving its implementation ?