I have seen your posts here for a few months and you are far more knowledgeable than I am in Linux. However, I have to say I disagree here. I did use Slowroll for two months and found no problem, nor a need for much wikis, if any... now, I dont have nvidia so maybe that is why. The main developer of Slowroll is awesome (personable and reachable) and his professionalism is what make him not categorize his Slowroll as stable so it is not listed as such. He has previously mentioned the challenges he is facing with the concept, but that can be addressed in due time. Most people in OpenSUSE should use either Tumbleweed or Leap for now.

Regarding OpenSUSE, it is a tad behind Fedora in refinement but minimal. Its biggest handicap, however, is its small footprint in the Linux marketplace, yet still amazing what they had pulled off with their limited resources.

Your beloved Mint, oh gosh, how much I tried to like it, but aesthetics and lack of flexibility kills it for me. It is, hands down, the less problem free one, no questions, it is what I recommend most for someone that need a set-it-and-forget-it distro, Mint is still the one. But I just cannot work happy with Cinnamon, even when first started in Linux. One system in the same ubuntu branch that I found almost as reliable as Mint, but with fairly new KDE, is TuxedoOS; more stable than Kubuntu, a bit less than Mint, and close in freshness as Fedora/OpenSUSE Tumbleweed