OTOH Grails 2 invites people to use the awful formRemotes, which apparently are an idea lifted from old versions of Rails, and are a mishmash of html and javascript. Seems quite an opinionated approach on how you should build your frontend.

Luckily Grails 3 dropped it, but the project I'm working on at the moment is stuck on Grails 2... and Grails 3 is a complete rewrite of the framework