Wasabi is excellent. However, they're under investigation by Europol. Chainalysis did an 3-week investigation for them and according to their findings, 30% of the funds washed come from the dark market. Remember, this is similar to what happened to bestmixer.io before they got shut down.
The thing is, they might be able to shut down wasabi's coordinator server which is managing the CoinJoin, but after all that is a decentralized protocol where no one learns anything about the other participants and no one can link other inputs/outputs together beside the one owning them.
When (if) wasabi finally decides to allow others to run a coordinator server, the whole process is distributed and decentralized. Shutting that down won't be possible since there is no single instance.
