That's why I asked about comparison with friends etc. Senses are highly subjective, hard to describe and I'm not a matter expert so I'm not hoping for a quantitative answer, but despite all this I believe there still are some learnings to be had from such discussions. HN is mainly a curiosity-driven forum - without this, we'd just complain about AI eating the world ad nauseam.
If they _lost_ their sense of smell, they had something to compare it with.