My comment was referring to your post hereIf they had the tech 100% market ready in the morning with a replacement fuel pump at every station in the western world, it'd still be for a propulsion method that is 60-80% heat losses, that requires shipping and pumping and what not and much more complex vehicles just to get a decent fuel return.
In comparison the electrical grid/solar is less heat losses and infrastructure that also has other uses than transport, but in transport is only about 30/40% heat losses.
TLDR it's bad money after bad in efficiencies.
If the artificial-leaves thing (or any of the other similar technologies that are being researched) can create syngas from sunlight at scale without creating harmful waste, then it doesn't matter that internal combustion engines are inefficient. There's no shortage of sunlight