I’m on my 5th year with my Oneplus 6.
I suspect I’d I do a full wipe, a new OS and a fresh battery I should be able to keep it going for a couple more.
Phones plateaued for me. It runs fast. It holds more then enough data.
Camera is a little slow. I’ve been told to stop using the default camera app. But then the double click to open won’t work.
On my pc with a couple ad blockers youtube is SLOW.
If i turn them off it runs fine.
On my android using adaway I have zero youtube lag.
So yeah. Seems pretty intentional