Electrolytic capacitors are not solid state and likely #1 failure mode for most electronics. There are options for better (e.g. Al polymer) capacitors that are

Electrolytic capacitors are not solid state and likely #1 failure mode for most electronics. There are options for better (e.g. Al polymer) capacitors that are rather expensive - overall good capacitors are 'expensive', e.g. more than a dollar a piece in some cases. The 2nd most common failure mode gotta be the mlcc (multi layer ceramic capacitor) cracks/shorts.