obviously 5 doors cars will suit bigger number of users, but many people just don't care
I mean my mother has some small Yaris which has 5 doors, but the back seat (height/head space) is so small I can't sit there anyway, so what's the point...
Btw. I am pretty sure cabriolets are still being produced, so are coupes, and obviously these are always 2 doors cars, those are not very good examples supporting your statement.
Also the new Suzuki Jimny was at release sold out for months/years in preorders.