Well, reusable rockets are worth it

This was already known, but NASA going through the test phase that involved rockets exploding get very different public push back compared to a private company using government money to do the same thing.

, LEO satellite Internet being worthwhile,

Already known, but the negative side effects that starlink ignores were the reason that didn't take off.

electric cars being a thing.

Electric cars were already a thing. My dad had a home made prototype one based on regular old car batteries with a very limited range in the 80s. What needed to catch up was battery tech, and Tesla was already an electric car company before Musk took over so his involvement has been to get government subsidies for the company to 'innovate' by ignoring laws and make shitty decision like hidden handles or limiting teslas fancy cruise control to cameras that gets people killed.

Other than securing government funding to prop those companies up he hasn't positively contributed to any of those things. All of his other decisions are wrong and he is a dumbass on the technical side who was born into money and knows how to influence people.