For a straightforward well constrained app, the complaint against rails is usually performance. But it breaks down as soon as the well constrained app has to be

For a straightforward well constrained app, the complaint against rails is usually performance. But it breaks down as soon as the well constrained app has to be maintained or grown for any amount of time past typical JS dependency hell. Rails/ruby perf is getting better with some new work in ruby with JIT and memory. It's got its work cut out to match up with Go, Elixir, or Node, but compared to the rest of the options, it also has a huge head start on some other basic things like community and support.