Supposedly, steroids keep you in a continuous anabolic state so there is no need to train too frequently.
Natties however need to train more often to renew anabolism.
Yes plus anti-catabolism. From personal experience you can stop lifting for months but if you keep a little testosterone going you can almost pick up where you left off when you go back to it. You lose a tiny bit of the "pump" or inflammation but it's back after one or two workouts. It used to be that old timer juicers said steroids do nothing but help speed recovery so you can train more and grow more

Not in my experience, can't tolerate a ton of lifting when on lots of roids. Not that they impede recovery I don't think but there's something about it where you just don't find yourself in the gym as much (that's if you were a natural doing a ton of volume previously).