I have a… I don’t even remember the number, lol... Apple Watch 6, I think. I don’t see any reason to upgrade. I didn’t see any reason to upgrade to the 7 when it came out. And I didn’t see any reason to upgrade to the 8 when it was released. I’m very much happy with my current watch. It has gotten a lot of use over the years (tracking my walks, runs, cycling, hikes, strength training, yoga, sleep, etc.), but it is in very good condition and the battery seems fine.
Eventually I’ll upgrade, but this year doesn’t seem like the year to do so.