I think the cap that people accidentally knocked the original Model B is an electrolytic....but the Pi (apparently) runs okay without it. As I recall from the early days, the MTBF for the SoC in normal use is supposed to be 40 years. In any case, at age 69, I expect my Pis to outlive me....mosespi wrote: ↑Wed Sep 19, 2018 10:13 pmDrying out of electrolytic capacitors gives you a defined lifetime for most modern electronics. I don't believe any of the RPI models have any (although your power supply may), so we go on to the lifetimes of all the other components, it's mostly passives and semiconductors. Modern passive parts and semis are very reliable if not over-stressed. Without getting into individual part MTBFs.. I wouldn't be surprised if a modern Pi, kept at a 'normal' temperature (60-70c?) and without moisture issues to last 10-20 years, maybe even longer.
I have one of the original RPI models running outside in a camera enclosure 24/7 since 2013, 6 years and still going. SD card (read only) is from 2014 and a USB memory stick which stores pictures has been replaced once.