We have the technology to replace 100% of our transportation fuels with biofuels from algae. You use solar thermal heat pipes to move seawater into the desert, and then grow algae on thermal raceways with solar paddlewheels. The lipids become green diesel and the remainder is processed for Butanol. Unfortunately, green diesel use actually went down due to the EPA's reduction of the renewable fuel requirement in 2014 (and through to today) although the EPA blamed it on "Limitations in the ability of the industry to produce suffcient volumes of qualifying renewable fuel, particularly non-ethanol fuels" — though this is a completely transparent lie, since they were making more before the EPA cut back the target. As for Butanol, we would have been able to buy it already if not for a patent dispute between Gevo and Butamax. The patent in question was developed in part at a public university, therefore it was developed in part with our money, but it is held by BP and DuPont's shell company Butamax who has been suing Gevo for years to prevent them from selling us Butanol fuel.
So yeah, go Musk, go EVs, but we are not using petrochemicals to fuel our vehicles because we have to. We are doing it because Big Oil is a branch of government, lying betwixt Congress and the rest of society.