I use it as something neat to do, for a bit of nostalgia sometimes.
But maintenance-wise, ancient devices (by your definition) can be a big problem. For example, I have a cassette player where the internal belt stretched and I had to get a replacement, then disassemble and repair. Hassle. Battery pack is odd, non-standard cell also with less battery life than we are used to today. I also just played a Sega game from the early 90s...graphics on my TV were so much lower resolution than we are used to today, although the game was still fun (Master of Monsters).