This is a funny comment because that's almost exactly what I have a degree in. The point here isn't the engine though, even though those are also a separate beast, but rather that all of these vehicles are packed to the brim with a bunch of chips with internet access and you have no idea what's really running on them. With electric cars we're seeing even more of this than with ICEs.
Sorry, a quip in bad faith. Collectively, _we_ (would-be car maintenance people) are not well enough versed in how these types of systems are designed. This is a collective failure, lack of documentation.
