Just like the gentle nudge you do to your friend when you want him to see the guy holding the Samsung Galaxy S8 next to you, Apple has been trying to get app developers to pay attention to its desires, Apple wants these code monkeys to write using 64-bit code only.
The last gentle reminder was a comment from Apple that future versions of iOS wouldn’t support 32-bit apps. But the time has come for Apple to give developers a more heavy-handed reminder.
