Maybe it is fancy to you now, but with a few primitive hand tools and no docs at all, a HS graduate can take it apart and figure out how it works.

Try doing the same on the ECU in your car. I'll wait.

I learned how engines worked by taking apart, cleaning and reassembling an ancient lawnmower engine so I could use it on my go-kart. I then learned how cars worked by taking one apart and putting it back together again.

Neither of those machines had a transistor in them. It was all basic electricity.

> HS graduate can take it apart and figure out how it works.

Sure you wouldn't like a qualifier on that? I've definitely met some HS graduates that would not be able to do this.