... also they just curate their fonts well and you don't have to wade through piles of shit fonts and "your download will begin in 15 seconds" like other font sites.

Also themes. I've downloaded/purchased about a dozen of HTML/CMS/static site themes for my own projects over the years, and modifying them to get rid of Google's Fonts is the very first thing I have to do. With various JS/CSS libraries, there's a chance that they'll be self-hosted. For fonts, they're always loaded from Google Fonts.

I then have to occasionally re-do that work when there's a significant update to the theme that I want to have. It's really annoying.