With today's electronics, nothing will last this long.
They might get so complex that failure happens but my first computer still works. My cell phone is running 3 years 1500 minutes a month and has never been turned off. People pick on technology but Mill spec stuff is about as reliable as you can get and as long as your program does not fail then it will run for ever.
I often hear about the reliability of old cars which is kinda funny compare a 1940's what ever and you would have had to rebuild it 4 times and had it in the garage 20 times beyond maintenance in the time it takes your car to hickup.
don't be too hard on new stuff. New stuff does more then old stuff and does it faster and cheaper.
The equivlent to pioneer would still be going today because it would have drawn 1/10th the juice and weighed 1% of what that craft did and done 5,000 times as many measurements. So it would have exited the solar system 15 years ago due to increased velocity.