I've been on the hydrogen bandwagon for years, but the fact of the matter is, E-Fuels and HVO Diesel is an actual, viable option now, especially with efficiency reaching ever higher numbers year after year. 5 Years ago, one liter of E-Fuel was around 3-4 Euros (projected), now it's around 80 cents.
There is nothing cheaper than just changing out fossile fuels for sustainable and carbon neutral (maybe even carbon negative, because some company's are already thinking about putting a part of the saved carbon in the ground for long term storage, because it's going to be cheaper with co2 taxes to just put a part of that away for good) stuff and just using existing infrastructure.
The 25-30% of people that are going to be getting EVs are easily buffered with the existing grids.