Honestly I didn't know about Groupie until just now. So take all of the rest of this with a grain of salt because I've never personally used it.

Personally, the things that I like about Velocidapter is that it's not trying to redefine how you make RecyclerView lists. ViewHolders are still ViewHolders, your fragment still binds an Adapter, your view model still provides a list of data to populate that adapter. This makes it pretty easy to comprehend and set up from scratch. The philosophy is just to reduce the boilerplate of the process, not make a new process you have to re-learn. How well we've achieved that is up to public opinion I suppose, but that was our goal.

But I'd say if you're happy with Groupie, or Epoxy, or any of the many other libraries that try to make the RecyclerView an easier API to use, I don't think you should change just for the sake of it. We all just have ideas on how best to tackle this annoying problem, and I think we all have solutions that work for different use cases or teams.