The problem with the age and capacity points is that Trump can still speak at an idiotic and simple level to his base and fire them up. What’s coming out of his mouth is conspiratory ramblings without substance but he’s not stuttering and doesn’t look feeble while doing it so his base eats it up. Any time he actually tries to talk substance on an issue it’s clear he’s an idiot but that was true in 2016 and 2020 too.