Does everything I want it to. Everything still works. Rooted. No ads. Still runs fast. Never used up 80% of storage.
Only notable issue is my battery. If i'm away from WiFi and I'm using it a lot (listening to YouTube ad free on fire fox) then I'll run outta battery by the end of the day.
Near as I can see cell phones hit a plateau 4 years ago. And unless you have a phone with built in obsoletence - there's no reason to upgrade anymore for the average user.
I found out the last time I bricked my phone that the number of people willing to help me had gone from 'help in minutes - live help' to 'answers via a forum - hours and days response time' and that's why my phone hasn't changed anything major in 8 months. I'm too afraid to mess anything up.