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Their Bionic Eyes Are Now Obsolete and Unsupported
(spectrum.ieee.org)
This is a most excellent place for technology news and articles.
You are not doing an accurate comparison here.
You are ignoring all the stuff that died early (survivor bias). You are ignoring the maintenance crews that keep that stuff going which you know isn't the same as performing surgery. You are ignoring replacement parts. You are ignoring the conditions of operations, the human body is wet. You are ignoring the changes of electronics that made them less reliable but not prone to giving people lead and mercury poisoning. You are ignoring the amount of work being asked to perform from the electronics.
Also Voyager was not designed to last 5 years the engineers involved admitted that. They planned for it to last much longer but NASA management didn't want to oversell it.