I dunno, my phone's always start to have issues if I keep them too long. Boot loops, frequent crashing, random resets, functionality failing to work as it did when new, lack of security updates, etc. The hardware is built to fail
Yeah :( I love my 2017-2018 phone to death (it's a Pixel 2 XL, and in the ~โฌ400 phone market they are still trying to beat its camera quality 6 years later - and since it's a Pixel it's still more fluid than several phones I try in store, like โฌ400-500 Samsungs, that display evident stutters that mine does not), but it has started with the random crashes and "dying" (boot loops followed by not turning on anymore) for a few minutes / hours before coming back to its senses occasionally
Yeah, I'd still be using my galaxy note 4 if it didnt start having so many issues. Used that phone for what seemed like 6 years. Well built, but the replaceable batteries that were reliable were harder to come by. It had boot loop issues, it had some sort of memory corruption defect that was common with note 4s.