[phyrex]

I don't have any numbers, but we know that the Meta family of apps has ~3B users, and that most of them are on mobile. Let's assume half of them are on Android, and you're easily looking at ~1B users on Android. If you have a nullpointer exception in a core framework that somehow made it through testing, and it takes 5-6 hours to push an emergency update, then Meta stands to lose millions of dollars in ad revenue. Arguably even one of these makes it worth to move to a null-safe language! I know your point is that you need to have that sort of crazy scale to make it worth it and that's true, I'm just annoyed at the comments suggesting that the move to Kotlin is just to pad resumes or because Meta let a bunch of bored devs run amok.