It’s absolutely unusable. Early Facebook’s niche was actually really good and cool too: a service built around developing and maintaining the sort of relatively weak IRL social connections that would usually just decay. Like, something to keep up with and stay connected to your high school friends or college roommates or friendly acquaintance you met at the gym was actually really neat. A lot of people got a ton of value over that, and I think it did genuinely improve the world in some ways early on. But that shit isn’t profitable, so it couldn’t last.