Well, you do already have that centre-right party that ultimately decided not to run because they couldn't agree on a presidential candidate, right? There were some pretty high-profile people in there. When the Republican party starts infighting once Trump's gone, that other party might be able to take up more space, and actually become viable.Yeah there could be a bit of that as well. Ultimately, non MAGA Republicans would become political refugees if the entire Republican party were to go down in flames if Trump goes down. The only ones that may be happy about that would be the likes of Liz Cheney, Romney and a few other stragglers.
Wishful thinking maybe, but I think currently more likely than the Republican party crossing the border back into sanity after Trump's departure.