Serifs are a skeuomorphic artifact of stone-carved text. They're no more legible than sans-serif fonts (see https://news.ycombinator.com/item?id=47492894 ). The only reason people like them is because they're used to them. You can get the same feeling from bitmap fonts if you read them enough.
I very intentionally didn't say serifs were more legible than sans-serif.
There are reasons people like them more than just that "they're used to them", however. I named a couple of them. Just because they originated in stone doesn't mean we kept using them for the same reason. A lot of things originate for one reason and then become used for other reasons.
Believe me, I got "used to" bitmap fonts throughout the 80's and 90's. But I still always preferred the 300dpi version of a document from my LaserWriter and then inkjet. Getting used to bitmap fonts never meant preferring them for general computer usage. Jaggies that appear arbitrarily on some strokes but not others is not visually pleasing. Nostalgic, maybe, but virtually never anything you'd choose if you weren't intentionally trying to create a retro vibe.