This is to offset the fact that the ratio of damage to cards increases as the burn spells rise in cost
Cards like Kodama's Reach or Nissa's Renewal let you drop multiple lands in a turn, letting you go from zero to stampede in a single turn
So design your own battle decks
We just saw Ob Nixilis, Captive Kingpin get printed in Mach of the Machine: The Aftermath and it turns out that in the end, the card did not work with Rakdos Charm the way we wanted it to
Affinity or robots or whatever you want to call it is an incredibly powerful deck comprised of some very narrow cards
Nadier, Agent of the Duskenel Nadier, Agent of the Duskenel creates an interesting loop where tokens you make and sacrifice or kill in combat buff it, and when this black commander leaves, you get to make a lot of tokens