About to enter the same boat, I have the Note 20 Ultra and its on the eve of losing security update support. Don’t necessarily want to upgrade but i feel like i don’t have a choice.

Going to look at something like the Nothing Phone 2, it’s not nearly as expensive as the S23 Ultra (which is my direct upgrade path) but is plenty fast enough and has at least some interesting quirks and features.

Tbh, i could get a used digital camera + a mid range android phone and probably out perform the flagship Samsung.