Well, for starters, after trying wheat, I figured the Fermenter only wanted saplings as vegetable matter. Which can be a pita to arrange without automatic farming of some kind.
So, I still had some ethanol crystals, but far too many video games have trained me to horde every little resource I get given, and it feels inefficient using the gasoline engine when it is supplying more power than is required for most tasks you have at this stage (well, trying to build the gearboxes to rectify this problem).
So one ends up de-prioritizing the gas engine until one has a working grinder producing canola oil. Which either requires an array of steam engines or a hydrokinetic, at which point the implicit requirements of running a gas engine (efficiently) has effetively made one skip the gas engine. So why go back to the gas engine now that I can wind industrial coils using one of the free energy solutions I was (felt) forced to build as a pathyway to the gas engine?
Not to mention the lack of control the gas engine gives - it simply consumes its entire fuel supply without stopping. The machine would be a LOT more tolerable if it required a redstone signal to actually go so a lever could turn it on and off.