There are more PCs and serious home computing setups today than there were back then. There are just way way way more casual computer users.

The people who only use phones and tablets or only use laptops as dumb terminals are not the people who were buying PCs in the 1980s and 1990s, or they were they were not serious users. They were mostly non-computer-users.

Non-computer-users have become casual consumer level computer users because the tech went mainstream, but there's still a massive serious computer user market. I know many people with home labs or even small cloud installations in their basements, but there are about as many of them as serious PC users with top-end PC setups in the late 1980s.