I've worked in electronic mfg for a good deal of my life and ammonia disolves copper so any copper in sensors and shit will be gone very soon and strong ammonia smell like a diaper facility with piss filled diapers so it's a no go and any copper allows will be severely weakened so I call bullshit. Also copper leaves crystals behind when etched so any filters will be clogged with it faster than fuck. Also it can chock you out by displacing the air in your lungs since it's heavier and it evaporate at room temperature so unless the tank is totally sealed it will empty into the air when the gas cover is opened.
Good comment. I suck at chemistry.
That said, I expect most if not all of those are addressable. For example, those types of changes would be part of a conversion kit. Which he estimated at around $1k per vehicle. Similar challenges with ethanol. Which is why car parts were updated for compatibility and not allowed in most aircraft.
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