Samourai no longer has Whirlpool, it was shutdown, so the privacy offered is considerably less than what it once was.
And even then it's privacy wasn't cheap, fast, or as robust as Monero offers. It also required you to run your own Dojo which most users simply aren't going to do.
You can easily coinjoin BTC with Wasabi nowadays. You pick your own coordinator, they don't run one for obvious reasons. Works flawlessly.
I thought it was cool what Kruw did to help decentralize the servers, but there are still a few disadvantages vs Monero
Largest inputs in a round have less privacy
Non-uniform amounts (more vulnerable to amount analysis)
Smaller anonymity set especially for recievers
Liquidity isn't shared between different coordinators
Still more expensive in tx fees
What about stonewall 1 and 2, ricochet, and stowaway? Did they go the way whirlpool did?
Haven't had a chance to do the research on the back end -- didn't realize any of this was centralized enough to be shut downable.