Component audio equipment and decent car stereos, too. I still have my Cobra CB radio, Sansui receiver, B&O turntable and Sansui speakers from ‘77 to ‘79.
They all still work and still sound good, but I won’t turn the receiver on again until I replace the caps. To dried out now to apply power. Same for the belt in the Beogram turntable, too. I wonder if I can find one now like you can with Sansui upgrade kits and parts.