You say the bill they are trying to pass is already dead in the water, but I don't think that's actually happened, I mean SEC, DOJ, and other authorities are keeping an eye on all mixers, they are studying them, seizing them, not doubt they are doing the good stuff by keeping an eye on these mixers, because people using, promoting, building them, don't want to be a part of something that fakes everything, (means that fakes its real purpose of ML).
So for the wise adoption of the BTC and crypto overall, such steps are welcomed by me, but speaking of this particular legislation so-called as dead, I don't really think it is, or maybe it has given a purpose to authorities to keep an eye on all the mixer possible. They are doing everything to hold onto something so that they can seize another one. The points discussed in the quoted post, are valid that its quite hard to pick the infected tx from the last 2 years, although not impossible.