I am testing the IPhone 13 now. It is quite a jump in UX, hardware capability (5G, camera, storage space not so much). Also, your flashlight app does not spy on you.
The Note 3 was truly a masterpiece when it came into the market. Also, the the exchangeable battery was very practical. And 8+ years in use: what a economical and ecological device.
If I find some time, I will have a look at lineageOS. Any hints?