Rails biggest weakness is Ruby?!?! The only reason Rails came about (so says DHH) is because of Ruby and its expressiveness as a dynamic language.

Granted, we're in Swift mode here and it's static typing, protocols, generics, and closures all the way. I'm fine with this (I write in Swift everyday) but Ruby is a great language as well - I love them both.

I think there's a place for both static and dynamic typed languages and I'm not going to throw away Ruby just because Swift is more "correct" with typing.

Having worked on my own Swift web framework for the past few months, and Rails for years, we're not even close to approaching Rails feature set. Rails has been in active development for over a decade and it's going to take a while for a Swift framework to make some inroads.