Trump is not just a personality cult (anymore). Trump is an idea.Thing is MAGA is itself is very divided; you have a major split between the Libertarian wing and the Religious wing for one.
And what happens when Trump kicks the bucket> I can't see anybody rising to taske his place; that is the thing about personality cults, once the personlaty is gone they fall apart.
When Trump is gone, someone else will step into his shoes. Probably someone less stupid, a lot younger and likely even more dangerous than him.