As a long-time Rubyist, I took a serious look at Crystal for the first time and discovered a lot of the best batteries of Ruby included in Crystal. So pleased to find an RSpec-like DSL for testing, for example, and Crystal's Rails-like framework, Amber, generates scaffolds with Bootstrap built in. It's almost cheating how much learning and takeaways the Crystal core team can borrow from Ruby! I'm really liking it so far.
While Ruby allows you to choose and provide way too many choices, many guns for you to shoot your foot into. Crystal decided some are not good and actually enforce those best practices.
I think Lucky [1] is actually a more Rails Like framework.
( Or more like both are NOT like Rails. As features rich or heavyweight, Rails provides more then you will ever need. )
