If you look at the electric energy used for driving the same range, the "e-fuel" powered combustion engine is like a factor of 10 off. The combustion engine alo

If you look at the electric energy used for driving the same range, the "e-fuel" powered combustion engine is like a factor of 10 off. The combustion engine alone is at least 4 times less efficient than the electric powertrain and that does not account for any inefficiencies in generating the e-fuels nor their processing and transportation. It would be a disaster to produce them while there is any coal or oil burned for electricity production. Only when they are used to replace the last usages of fossil fuels, they make sense. As you write, for planes for example.