@tchambers
It is a noticeable but not huge. This has been the case for a while though, small noticeable waves of people leaving after an event (Brazil, UK, block button, AI issue) chipping at it a little at a time.
I have talked to many users who find X best for them because other platforms are not welcoming (AI crowd, crypto crowd etc) and also others who find better engagement on other platforms, so it's a mixed bag.