If you’re asking about more imagery coverage, Mapillary has a lot. The wiki has a list of street-level imagery articles.

OpenStreetMap is more about the map database, so any imagery association tends to be loose, and is more for use as a useable source for ground truth.

Have you checked out Every Door?

StreetComplete is intended for local, on-the-ground surveying only. Editing remotely is not supported, and will result in problems.

(I’m not sure whether you’re editing remotely vs reminiscing during in-person visits, phrasing is slightly ambiguous.)

But… is it posted here? This intentional degradation/rot feels like the burning of Alexandria.

If one has a history of only making comments that they don’t consider to have value then, maybe.