On MK4 printers and later, the only thing the stealth mode seems to be doing is slowing down the bigger linear moves. I don't notice any difference in sound otherwise. The fan is what you mostly hear.
It works with real-debrid, there's just fear that real-debrid's content will be reduced by the outcome of the latest lawsuit. I've switched to TorBox because of that (and the lower price), but I honestly haven't noticed any degradation of the real-debrid service yet.
My only gripe is having to insert my password every 15min (afaik it's either that or having all your accessible by anyone using your computer). That and the fact that they discontinued the password manager they had on Android. This is what made me move to bitwarden.
On MK4 printers and later, the only thing the stealth mode seems to be doing is slowing down the bigger linear moves. I don't notice any difference in sound otherwise. The fan is what you mostly hear.