What item have you been using on a daily basis for the longest amount of time?
Sometimes I will use something and realize I've owned it forever. It's a nice change in our throwaway reality. I think my personal record is a bicycle multi-tool I got for one of my first bikes, ~25 years ago. Still have it, still use it. When it comes to electronic devices I have a Panasonic mini Hi-Fi from ~2005. Never felt like changing it.
I grew up decently poor, always getting cheap shit.
But now that I’ve got an education and a good paying job, I’m starting to collect nice things that are nice to have and use.
The one I’ve had the longest w actual daily use would have to be my stealcase chair. I did the frugal thing and bought it used, but it’s been a couple of years and it shows no signs of giving up any time soon.