The Pixel 3 I have I got used and it still works, although the back glass is broken and the battery health is 85%, and stopped getting updates around a year ago. I’d say it’s 5 years run so far (released October 2018) is pretty good. If you know of any other devices that would be useful for 4~7 years please share! I think high end Apple and Samsung devices would, and they are now committing to longer software support, and are likely to carry though.