I agree with you on Bonanza for sure, to the point where, if I play the game, I have to put it on auto and not watch as you can tell if a spin or cascade is going to result in a win of some kind.
With Rhino, I used to play this loads years ago before SG updated everything but with all their slots then like Rhino, Monte and Ruby Slippers etc if the feature was landing, the first reel would drop in a lot quicker so if watching while playing you would know if it was landing before it did. Don’t know about the newer versions though.