Rate limits, even more censorship, more blue checkmarks, blue checkmarks sorted to the top of threads, can't see accounts if not logged in, growth in scam ads, musk's tweets promoted to everyone's feeds...
I'm sure there's more. I stopped using the service because it was never great but now it's one of the worst properties on the internet.
* everyone's DM settings got changed to only allow DMs from blue checkmarks/Musk sycophants
* There are now rate limits on DMs unless you pay for the checkmark
These changes of course are justified with spam reduction. IMO the best spam reduction would be to allow me to hide all tweets from people who pay for a checkmark and didn't have one pre-Musk
Almost surprisingly, blocking him does still appear to work. Though it will sometimes have him in the list of suggestions to follow, even if you've blocked him...