I think it’s safe to assume the versions are stable unless stated otherwise in their release notes.
When I move up I prefer going a few minor versions(7.X.Y) behind the latest build , and to the last bugfix version(7.X.Y). That being said I’m currently working with 7.19.0 and have not had any problems.
Hope this helps
If you’re staying at 7 then 7.23.* is an LTS version of 7. And as far as I know that’s the only version from which you can upgrade to 8. I’d say that’s would be a no brainer to upgrade to this version staight away.