People signed up for Facebook/Instagram/Twitter with the expectation that they'd get a reverse-chronological feed of posts from the people they follow. People w

People signed up for Facebook/Instagram/Twitter with the expectation that they'd get a reverse-chronological feed of posts from the people they follow. People were bothered by the algorithmic feed because it wasn't what they signed up for (and those sites' feeds are often quite bad at showing quality content). TikTok never promised that kind of feed, and by most accounts does a pretty good job at surfacing videos people will find interesting. It's an important difference.