There are some exchanges that avoid US regulations about high taxes and decided to move out of the state, and there maybe there are some countries that have less strict rules.
I do not recommend to move the Chipmixer base, but as long as we do such fair business without illegal activities such as money laundering, then it should be fine.
The thing with anonymous mixers such as the late BitMixer and the current ChipMixer is that there is absolutely no way to tell if money is being laundered. The blockchain could be analyzed to find similar inputs or outputs that could relate back to money laundering, but nothing is really certain. The way ChipMixer works at least basically makes analyzing the transactions for relations impossible, which means that identifying this is practically impossible. In turn, this makes governments not like it since illegal activity *could* be happening but there is no way to prove it. Because of this, regulations may be created to limit mixing activity or classify it itself as flat out money laundering itself. So as you see it's not only about there existing illegal activity, but also the potential for it.
You're right, bitcoin couldn't be traced after mixed, and that's why Government could push another mixer to shut down, maybe.
There's no way to track down money laundering if they use bitcoin and cash to transact without using exchanges and bank services.