I disagree, I think Trump has actually kept all those voters you mentioned but has lost the RINO types which used to run the GOP, and in some ways still do. (think Cheney)
The irony is, they gained power by depending on conservatives to vote for them, but wont return the favor.
I grew up in New York and was bred to be part of their class. So, I know them, better than a lot of good, honest, decent Americans do.
It was always absurd to think that they would "return the favor". Most establishment Republicans (I don't use "RINO" because the establishment ARE the real Republicans)- most establishment Republicans are in politics to suppress what the people we call "conservatives", to prevent them from gaining or exercising power, and every time one of ours loses an election, they smile and nod knowingly to each other.