I wonder how many will simply become "Trump Republicans" and follow some other leader when he's gone? Or will some simply pretend to wake up and have realized they had Trump Derangement Syndrome the whole time and are ready to come back to reality?
Watching this from the other side of the ocean, I'm not convinced that it's the most likely outcome.
As soon as Trump dies there will be an increasing avalanche of "always never-trumpers", until 40 years from now it will be almost impossible to find anyone who admits to having voted for him. I already have anecdotal experiences of having conversations with people (on tape) in early 2017 celebrating/defending their vote of Trump who now claim to have never voted for him and say that anything on video was just a joke or sarcasm.