Well, again not to roast developers here as it's not doubt been a lot of work, but just as a user, it doesn't quite look like v7 is ready yet for professional use. Still too many bugs and hiccups. IMO anyway.
But they need as many testers as possible, so that's a bit of a catch-22. If the pro users wait and wait, v7 will never get to the level it should be at. So, I dunno.
In any case, like I'm sure many others, I'm still using v6 for work. And I find it unfortunate that most Linux distros have directly switched to v7 as a "rolling update". I think they should provide at least a separate v6 package. Right now, they don't seem to? So you have to build it yourself. Or use a flatpak or whatever. I think a "kicad6" package, that can be installed alongside v7, using the package manager (instead of tricks) would be a nice to have. Just a thought.