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.
What’s your record?
I have plenty of things that are really old, but the longest in daily use would probably be a Galileo thermometer my dad gave me in my early teens. It looks like this, but the colours have long since faded: