I dont know how to organize this other than to just have it be a list of my thoughts, so here goes
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
Kykar, Wind's Fury, one of the best Jeskai commanders, gets token triggers when you cast both sides of an aftermath card since all of them are instants and sorceries
Also, as you can see, that Charizard from the top of the article has nearly doubled in value already , and cards like the popular 'Eeeveelution' variants are similarly bonkers