Unlike other consensus "bests", it's relatively unknown to the public (which is understandable for many reasons). It's very likely that if you're a puzzle game devotee, you will fall in love with SSR; but at the same time, if you don't have experience with puzzle games, you'll very likely hate it.
As a result, I've always thought it's an interesting window into how we value "taste" and "mastery", how too much mastery can actually distance us from one another, and what meaning there is in designing games for an ideal world shaped around ourselves, versus the world we actually live in.
It's well-known that puzzle games sell badly on Steam, and I think part of that is that difficulty and struggle is an acquired taste. Most try to paper over that gap with nice soundtracks and graphics, "hooky" mechanics, and narrative. SSR is so interesting because it contrasts so violently: it's ascetic, has no obvious hook, and offers nothing but difficulty and struggle, and the best feeling in the world if you decide to push through it anyway.
I'd take Void Stranger or probably even Deadly Rooms of Death: The Second Sky over Stephen's Sausage Roll any day, I imagine.
https://youtu.be/85mAmP4k1Co?si=yuxpJ2xhkH7r_eo3
The video has lots of helpful information for puzzle game design. I have started to incorporate some of that knowledge into my own puzzle game https://qcgeneral29.itch.io/lets-learn
Never heard of it.