Heck, a big part of TikTok was Musical.ly, an app for lip syncing videos. That was a huge stroke of luck/foresight because it gave TikTok a lot of the music rights deals they would need to allow people to put videos to music.
Are you really arguing an app around individual videos set to music (which, in my experience, is still the vast majority of TikTok videos) is somehow an "incremental product change" to a friends-based social network?
1. Content that is profitable from an advertising perspective
2. Censoring certain content/only showing major/authoritative sources.
TikTok changed that by allowing grass roots content to go viral, which from an algorithmic perspective is less profitable. But that doesnt matter, its backed by the CCP. Theres alot that goes into why tiktok is better, and alot of it is monetary/business related, not computer science.
But beyond that, FB/Google just got lazy and stopped pushing for new things. Wildly successful and presumed monopolies, they left a massive product gap (allowing grass roots content to go viral), which TikTok filled.
They hype around it is because it is the current thing.
[0] https://futurism.com/tiktok-spy-locations-specific-americans
Totally unimpressed.
With all due respect — Facebook (the product) is one of the social platforms furthest from TikTok. Even roughly equating them sounds like you might not use, know, or understand any of them. Vine, YouTube, or Snapchat maybe — they all differ in different ways — or even Insta I get ... But Facebook?
This is straight up wrong. Both companies ask difficult algorithms questions in their interviews.