Conservatism is intellectually and morally bankrupt nowadays, so I don’t know why the death of it would distress anyone outside the GOP consulting class. Not that liberalism isn’t also intellectually dead, though
Im a conservative and no its not intellectually bankrupt. Most conservative economic policies come from the Chicago School of Economics which is run by intellectuals. Its not morally bankrupt either
As for Conservatism leadership yah having Bush/Cheney be its leaders in the 2000s was not good but that's cause they were incompetent not cause conservatism is what failed in the 2000s
The Intelligent Right has gone from William F. Buckley, George Will, and the Weekly Standard to Tucker Carlson, Candace Owens, and Brietbart/OAN. If it's not dead, it's on life support.
That is not what the intellectual right is and even the earlier names are really not the intellectual right.
The intellectual right are the people who make up the think tanks so in this case its mainly ideas and people from the Chicago School of Economics . The think tanks are the ones who write legislative policies not any of the names you mentioned .
Also George Will is so right wing he thinks Marco Rubio is against capitalism: https://www.unionleader.com/opinion/columnists/george-will-marco-rubio-joins-the-anti-capitalist-conservatives/article_ee972176-3171-579c-9aa4-6e417c03c783.html
Then the intellectual right is even more stupid than the twitter conservatives.
People in the Chicago School of Economics have PHDs
So do vast number of marxist economists What's your point?