Most won’t go on record either way just yet. I believe Ben Shapiro calls himself a sometimes Trumper now, but he could turn on a dime, again.
I believe it was Dennis Prager, who said, to paraphrase, that among his last choices in the 2016 primaries was Trump. But that, in a binary general election, he supported Trump. When given the binary choice in the general election, he felt he needed to support the Republican nominee.
These never Trump types are willing to cut off nose to spite their face, so to speak, if they don’t support Trump in the election.
Would they really rather see Joe Biden and his Democrat VP and cabinet running this country? Because we know with 100% certainty that the president elected on Nov. 3 will be either Biden or Trump. So if you don’t support Trump, then by default you are supporting Biden.