After all, you have Manacles and the like to weaken your opponent's monsters, and on top of that, with the other effects stacked on, Iron Chain Dragon alone could top 3000 with ease, and topping 3000 in today's meta is very, very good, since most monsters now (barring Blue-eyes cards) are based around their effects- many of which won't get to proc their effects if you A.) Stop them from being made, or B.) Stop them from being able to pay their potential costs
There are a couple of cards that players of the unsanctioned "as-written" format would appreciate, such as the aforementioned Corpse Knight, but for the most part they still aren't much more expensive than any properly-printed copies that may exist
Choke An amazing sideboard card in Modern and even Legacy, I expect Choke to also creep up over time due to not getting a reprint
It's a great way to close out a game if you manage to generate infinite mana