I mean, Anzu and Thorn didn't really use Osiris all that often anyways. It's a decent floodgate for control strategies that can't deal with swarms but you have to go minus three to make any use of it and most of the time it's going to be sitting on the field with 0 ATK, maybe 1000 at best, because by the time you're playing it you're typically almost out of gas anyways and keeping cards in your hand to pump it up just isn't worth it.

At least Obelisk is a rock-solid beater at the very worst—even though a 4000/4000 body for minus three is kind of bad unless you're dealing with a deck that has a metric ton of huge monsters—but man, Osiris really got the short end of the stick.