Matchups like Zoo or Burn versus Storm often come down to a race, with the aggro player looking to kill the combo player before they can put together all of their pieces
This set truly is massive
For instance, if you're playing a creature-heavy deck and constantly get blown out by Wrath of God effects, then having Teferi's Protection or a way to rebuild quickly (like Collected Company if you're in green) in your sideboard is crucial
You get disruption and mana production in one slot, and paying 3 life to have your land untapped can often be the difference in a tight game
Its an annoying compromise to have to make, but if youre in a position where the best cards simply cost too much, and thats definitely the case a lot of the time in MTG, then picking the boring but affordable choice is going to do you a lot of good
When you do control at least three of other people's permanents, it turns into a 9/9 creature, which is scary enough on its own