[kylek]

I wish there was an odometer for electronic devices.

edit: Yes, I guess that would just be a counter. But it'd be fun to see how many miles a relic like this actually has.

[shakna]

There sort of is - the clock battery in the NES cartridge. They tend to run down slightly slower without usage. Rough estimates suggest 50 years if untouched, but I've seen a handful of well-loved cartridges expire since '95.