Personally, I think all of the pundits trying to hold the NeverTrump line are hollow. They all fed the beast that led to Trump and must own their role in bringing him upon us all.
But I remain 90% certain that no lessons are being learned in the GOP, based on their continued obstruction and general lack of agenda.
I think there are intellectual conservatives and the opportunist conservatives.
Intellectuals: William f Buckley, Frum, Kristol, etc.
Serious and thoughtful policy analysis, defined and consistent philosophy.
Opportunists: Rush, Fox, most RW radio and TV, Breitbart, Infowars, etc. Trump is here.
The GOP relied on the opportunists to drive the votes, but did the intellectuals policies for the most part. However many of their policies were not effective (trickle down, deregulation, Iraq war, ) at least for the masses anyway.
Problem with the GOP is that the intellectuals overestimated their influence with the base. They don't really care that much about free market ideology, but did get hooked on the ever increasing amount of crazy and one-upsmanship from the opportunists looking for market share.
When the policies blew up spectacularly (eg 2008) who else had cred? Not the intellectuals and neo cons.
Trump was able to bridge the gap between the crazies and the jobless just looking for help.