I have been running the same copy of Facebook and Twitter and certainly YouTube on my phone for many years now. The only people who have been able to try to pus

I have been running the same copy of Facebook and Twitter and certainly YouTube on my phone for many years now. The only people who have been able to try to push updates at people like that are Snapchat, and even they have a hard time doing it quickly and at scale: and it only results in a temporary loss of service for the alternative clients! (And, even then, most of the success for Snapchat comes because 1) the official clients for Snapchat go far out of their way to do crazy obfuscation techniques and 2) they wield a ban hammer over end users over trivial infractions making it difficult to test; I fail to see how such would work for YouTube, where third-party clients are, in fact, plentiful). At F8 back forever ago, the reason Zuckerberg cited for having to give up on "Move Fast and Break Things" and go to "Move Fast with Stable Infra" is because they in fact couldn't rapidly push updates to their apps across the myriad supported platforms the way they could with their website, and so they effectively had to maintain API compatibility across ridiculously long timespans of client versions... much long enough to let the alternative clients reverse engineer the new builds and have updates out before Facebook can just kill service to the old ones.