Honestly

The way things look around USA, I wouldn't be hugely surprised if some state tried to secede in the next 10 years. Then again, it wouldn't be like brexit, because only the poor states in USA are looking to secede... and UK was certainly not a poor state in EU. That's perhaps why they only shout about it and not do it: they look at the numbers and realize they'd be fucked without the rich states, which are almost entirely blue states.

Even UK, the richest country in EU, didn't do brilliantly due to brexit. So in their funny way, they made it quite a lot less likely that any EU country actually wants to leave.