Hello Lisa,
You may think that I am a bit biased since I work for Objectif Lune, but I just want you to know that we are running version 7 on our own production environment. In fact, every release we ship runs on our production environment before we release it to the public.

Of course, I would advise you to test it in a sandbox with your actual processes as you should do with any software you want to update before going to production.