Can I ask a counter question,
Is Whirlwind.money Next To Be Shutdown? 
If there is going to have a thread like that, then we will have episodes of the names of the mixer that will likely next target to be shut down, if we're asking about what happened to Chipmixer and the fate of the other mixers the topic should be generalized for all mixers not just one, as if the authorities have only eyes on Sinbad
And there's openness on Sindad's founder based on the article you provided
https://www.wired.com/story/sinbad-crypto-mixer-north-korean-hackers/As for the tens of millions of dollars that North Korean hackers laundered through Sinbad? "Your magazine is the first one to ever contact me about this issue," Mehdi writes. "In case I receive a request from [Chainalysis] or any other institution I will investigate the matter and make my opinion on it."
So the founder is willing to address the issue and not ignore it or run away from it.