Assume mainstream adoption as used by around 7% of all github projects
Personally, I’d like to see Nim get that growth.
What could be the “killer app” for Crystal is an equivalent of Rails, since its syntax attempts to be very similar to Ruby. Even supposing it maintains all of Rails’ inefficiencies, if it “just works” and has a very small learning curve for RoR veterans, adoption could grow steadily
I think Lucky framework as well as the other one (can’t think of the name now) are pretty solid. What gets me is the ORM learning curve simply because I don’t have tons of time to dedicate to learning it.
It’s also limiting not having lots of libraries (shards). Basically if you need to do anything outside the framework you’ll have to write it all yourself.