I see discussion of phones supporting N years of updates in reviews pretty often. Android users I know think about it. Selection bias, perhaps, but it seems far from an arcane thing.

That feature seems to be relegated to higher end phones or certain brands though. Lower end stuff is kinda built with the expectation that it doesn't have that requirement. Sucks for sure, and I thought Google/Android was doing a lot of work to avoid blockers for upgrades... but still hasn't seemed to pay off just yet.