From older voters, what I’ve heard is: I thought this Elon Musk guy was just someone from the Internet happy to be on stage with Trump. I didn’t know he was the richest man in the World and I should have been told he would be leading parts of the government which decide austerity.
Some, but not all, of those voters also feared what Trump would do if he lost to a black woman prosecutor.
Being powerful means being a billionaire, and to Trump’s base the election was about power.