Is this the first time being banned? I've heard this before many times.
Everything is happening so quickly, yet there is no clear legislation banning mixers in the United States or restricting their access. I don’t know why what happened with Samourai Wallet frightened many privacy providers?
That is precisely what they are looking for. By creating or generating fear, many users will stop using the multiple services related to privacy, for fear of being arrested, fined... In this way they create a chain effect that spreads. Although I think it is unlikely that users should be afraid, simply thinking about it already achieves the effect they are looking for, thus saving them a lot of work.
In fact, I think the only thing this is going to create is new mixers appearing, with much more privacy available and new "anti-control" measures. It is possible that one of the solutions is Tor, but the fact that it is not 100% effective and the necessary knowledge (few, but not everyone knows how to use it correctly) make the idea unviable.