Elon Musk Says He Voted for a Republican for the First Time
wsj.com
wsj.com
1. Maybe it doesn't matter to alienate some percentage, if that percentage doesn't buy your products.
2. Musk is an outlier. His companies may take a hit, but he's imperious enough that he doesn't care. He also doesn't have a mass market company except for Tesla. See (1) above for why that might not matter.
Republican party does seem open to a larger amount of uncertainty. My understanding is Trump was a Democrat until his presidential run was obstructed due to Dem risk intolerance.