Problems with infinite scaling.
Due to the nature of the game right now, where early leads, early csing, and even 1 death in lane can cost you the entire match. Infinite scaling is at all time broken toxic levels..
Take nasus for example. Because of how insane the damage is in the game at the moment, you lose one time to him, or get an unlucky gank by his jungler that kills you, or hell, even pushes you back to base without teleport, or ganks you a second time after you tele.. you're screwed and nasus practically won that entire game by himself due to the infinite scaling. You can no longer contest him in lane because he has a 9 year slow + tick damage on his AOE and even if you remotely have a chance of killing him anyway he'll just ult..
Now every Q he does gets him infinite stacks, with infinite amounts of free gold worth of damage...
Now I haven't done the math myself, but but the amount of gold worth of damage he can get is in and of itself broken imo, (no champion should just be able to get free damage and hundreds of gold worth of damage for literally doing what eveyrone else does in the game..). This makes him a massive priority for both top and jungler.. (and even then it has to be a constant focus, or he will easily get back into the game).
Now the enemy has free reign over the drakes, and the enemy jungler can free hard focus bot to ensure that lane is losing hard.
Now you're stuck with 2 weak members + drakes going over.. All because the top laner chose an infinite scaling champ that HAS to be shut down 24/7 throughout the entirety of the game or he'll just bounce back through free gold damage stacking...
Maybe back in the day, it would of been alright, when 1 death didn't mean losing your lane... but now? No..