Some of my coworkers were talking about using RSS to read blogs, which made some of the younger folks in our team ask what it is and why we keep using it.
Some still use iPods to avoid subscriptions and streaming services, my favorite was one of our sysadmins who showed me Gopher.
I’m curious about others though, thanks!
The headphone jack on the laptop is probably the oldest style computer tech I use.
The oldest physical objects I own and use daily are the iron skillets.
As far as overall, not just computer? I make sourdough bread, grow stuff in a garden. The sourdough uses electricity to cook so that part isn’t old tech but the grabbing wild yeast from the air to rise it is ancient technology.