In the future to prevent crypto mixers from troubling the authority they will increase the time to do some background checks on their customer. I'm saying this due to how abusive leads to KYC in crypto casinos.
I wonder who will use them then. I guess the average joe won't have a problem with chain analysis, but I don't think they will survive long enough since it is unlikely that they will attract big customers. Any privacy enthusiast would use coinjoin or other options if that is the norm imo. On the other hand, they don't have to explicitly tell the public and just work together with the government if profit is still the goal. CMIIW.