Hard drives have had a good run, 62 years so far
The IBM RAMAC was introduced in 1956, 5MCharacters on forty 24" platters. It's really amazing that a mechanical technology from the 1950s has managed to hang on this long. Vacuum tubes were gone within a couple of years of the introduction of the RAMAC, core memory was replaced by DRAMs 40 years ago, tape is long gone. My guess is that SSDs will still be more expensive than hard drives for the next few years so the hard drive may be able to hold on until it's eligible for full social security.