I have a kindle 4 from 2011, still runs like a champ and holds multiple weeks of charge. I have had zero issues. I wish all gadgets were like this.
Sadly I seem to have kindles which suffer from increasing numbers of stuck pixels after 3-5 years.
I think I'm on my third now, and while I kinda begrudge buying new ones the paper-white I've got now, with backlight, is such a pleasure to use I can almost forgive it.