Elixir/Phoenix, Clojure/Luminus, ClojureScript/Macchiato and Scala/Play are arguably better than Rails if you really grok FP but they don't have the community,

Elixir/Phoenix, Clojure/Luminus, ClojureScript/Macchiato and Scala/Play are arguably better than Rails if you really grok FP but they don't have the community, maturity and adoption that Rails has enjoyed for a long time. If you're ok with OO monoliths Rails is hard to beat.