The 1900s version of Musk would be “infrastructure × rockets × batteries”
If Elon Musk had been born in the 1900s, he’d probably be churning out infrastructure-focused inventions centered on things like “satellites → communications,” “reusable rockets,” and “battery/power transmission systems before EVs.” I think he’d be the type to focus first on the biggest practical-impact areas—the whole “build it, launch it, connect it” category.