I've seen that opinion more than once and I tend to agree. Reagan conservatism has been replaced by angry populism.
That NEVER ends well for liberty.
Ever.
But… I think we are far too gone culturally to ever return to a notion of a civil society, which is the only environment Reagan/limited government Conservatism could exist.
The bulk of the population either want their king and dictator or have made the government their god and provider or both. Payback, revenge, imposition, violence and eradication are now the main motivation on all sides of current divisions.
There is no putting that genie back in the bottle. We are now fully balkanized, with the society standing in a pool of gasoline just waiting for that spark to set it all off.
Notwithstanding all the shock and ground troops that the Left, the GOP and Obama have placed here from South America and Jihad-sponsoring countries. The outcome is virtually guaranteed.
Fundamental change has indeed happened.
Most refused to notice it when it was able to be arrested. Now it is too late.
We are now France cira 1790, and I expect the results will be similar, if not more horrific.