Isn't it completely irrelevant for their development how the fuel is produced? My understanding is that E-fuels are exactly the same as "normal" fuels. They are

Isn't it completely irrelevant for their development how the fuel is produced? My understanding is that E-fuels are exactly the same as "normal" fuels. They are just produced in a carbon neutral way. You can fly a 50 year old Concord on e-fuels.