Crystal is really exciting, it somehow 'fell under the radar' but when I heard 'fast, and ruby-like with types' I became very excited.
There's even a Rails-like [0] framework being developed!
Last weekend I spend a couple of hours getting Lucky up and running (it took some doing, I had to borrow a lot from people's Docker images to get it booted and working).
It's a big 'watch this space' situation. The macro system for metaprogramming is very easy to understand in Crystal [1] as well.
I'd recommend you check out https://amberframework.org too. I also like Crystal but Lucky kind of turned me off considering the steep learning curve coming from Rails whereas amber is much more similar.
There's even a Rails-like [0] framework being developed!
Last weekend I spend a couple of hours getting Lucky up and running (it took some doing, I had to borrow a lot from people's Docker images to get it booted and working).
It's a big 'watch this space' situation. The macro system for metaprogramming is very easy to understand in Crystal [1] as well.
Can't wait for 1.0!
[0] https://luckyframework.org/ [1] https://crystal-lang.org/