MAGA is a classic Cult of Personality, and Trump's death will be the end. Like all Dictators, he won't name a successor because he doesn't want to give any power to anyone else, so he'll let Rubio and Vance fight it out for his own entertainment.
Meanwhile there are a bunch of MAGA losers entertaining the fantasy of taking over MAGA when Trump dies. Guys like Don Jr. You don't think he feels like he's ENTITLED to succeed his father to the throne? Or Hegseth? Or Lindsey Graham? Or DeSantis? Or Abbot? Or Tucker Carlson?
When Trump assumes room temperature, the knives are going to come out, and the backstabbing will begin. It will be glorious.