Modern cars packed with electronics and extra systems yet they fail much less often.
Not because they're more complex though, because they're made to higher standards... make an older simpler system to modern higher standards and they'd rarely ever fail. Garages are full of modern cars with electronic ecu and other failures ... requiring expensive 'diagnoses by substitution'.
...and many taking say a modern diesel Tdi overland in hostile environments where failure cannot be tolerated, replace the Tdi injection system with a mechanical diesel injection pump with just a couple of 12V feeds, rather than using a black box that when it fails, can leave you stranded without a chance in the world of a fix.