Re: Over reliance on electronics
"IMO you shouldn't have any equipment on your boat you don't fully understand."
Ask the pilot on a 747 if he knows how to change the oil on his engines. Or the brakes. Don't expect so.
And while commercial aircraft have generally gone from 4 engines to 2 because they gain reliability by having fewer redundant systems to fail (catch 22) complexity is not necessarily a problem, if you have reliable systems.
A sextant may be more reliable than a GPS--but drop either one and it is offline.