This CoinCenter article offers a nice summary of what the main legal argument about.
Their confidence gives some hope, but keep in mind that the DoJ response to their earlier amicus brief is the whole reason everyone is very not-optimistic.
https://www.coincenter.org/dojs-new-stance-on-crypto-wallets-is-a-threat-to-liberty-and-the-rule-of-law/
DoJ is outta control
Very authoritarian and indicitive of how little they understand how this technology works.
It appears they view Samourai as a honeypot, but it's noncustodial.
Yeah the more I look at it they seem out of their element on this
I think they understand it quite well and have gotten better at their attack.
How would they confiscate non-custodial bitcoin?
Think they'll knock down doors and demand keys?
No, just intimidate the majority into compliance and then deal with - or ignore - the few remaining holdouts.
That makes the most sense.
It appears this thesis is already playing out.