I haven’t been able to solve CAPTHCAs in years.
Corporate backing is a two-edged sword, unfortunately.
I had Windows 8.1 but as the end of its maintenance was approaching I saw the writing on the wall with Windows 10 and especially 11 and I wanted no part of that. When 8.1 was put to pasture I returned to Linux and I have been content ever since. Seeing where Microsoft is taking Windows I’m more and more convinced that Stallman Was Right. I control my software, not the other way around.
After Thunderbird’s UI overhaul I jumped around a bit and landed on Claws Mail. It’s fairly old fashioned, but I personally prefer that and find it clear and logical. It’s a good client.
I’m on Tumbleweed and there are issues. As I understand, Slowroll is unaffected, though I can’t guarantee that.
I was hit by (what I assume is) a recent catastrophic Mesa update on openSUSE Tumbleweed. I’m mostly fine, experiencing some issues with cursors and the Yast window is all black. It’s also affecting Wine and some installers are broken. Now I’m just waiting for Mesa to update since I’m mostly fine and nothing critical is broken for me. I think this is the first actually major issue I’ve had on openSUSE.
If you want Debian with more frequent updates, consider going Debian sid. Base Debian is also fine, maybe with Flatpaks for more up-to-date applications where needed.
Mandriva was a Linux distribution that went out of business years ago. OpenMandriva is one of the projects that rose from its ashes with some of the same personnel and code base. It is an independent (not a fork) and community run distribution that, I think, does quite a lot with very limited resources.