The sign-in-or-sign-up nag screen has already stopped appearing as quickly, the end is nigh.

I’m betting on the opposite. If it doesn’t completely fail just trying anything is likely an improvement. I’ve never spoken to anyone who liked Twitter. It’s always just a means to an ends

Agreed. He probably didn’t let go many infra people. If some product teams were reduced in size and will become slower at butchering the UI, the user will only benefit.