Sounds reasonable approach to me. Also I’d include VPS and other cloud services too. “Is this VPS enough to run NextCloud” is a perfectly reasonable question for this community just like “is my old thinkpad good for…”. I don’t think there should (nor can) be a hard rule about what hardware to use. Questions obviously outside of self hosting (e.g. “what GPU I should by to play minecraft”) should go elsewhere but otherwise I don’t think there’s even a real need to limit activity.

And also there’s a half a dozen of posts here daily (unless mods remove posts really efficiently). My opinion is that even if the post could go to some other community but leans to self-hosting side of things it can stay. Maybe if there was tens or hundreds of posts daily it would make more sense to limit what goes, but as things are now I don’t think any kind of (in a lack of a better word) gatekeeping is beneficial to this community nor anyone else.