Yeah, Meta will continue to use Jest internally. It still works really well for us, it's just "feature complete" for our use cases so we haven't needed to invest in it.
What's the status of Rome? Is that being looked at as a long term replacement?
On one hand, I would absolutely hate for someone to force me to use one tools, opinions for everything I do in a project.
On the other hand, if I just start a new job and I need to get producing, I'd rather have one big tool that just makes JavaScript work. Versus 4 different tools with a bunch of different limitations.