Series 9 from series 7 adds:
- S9 Chip. Nice, but not an upgrade driver for me.
- Double tap. ~90% (maybe) covered by accessibility feature to clear notifications, alarms, timers. Personally speaking.
- On device Siri. Could be really nice. I use Siri a lot. Unsure of impact, yet, but unlikely to be an upgrade driver.
- Brighter screen. Not a driver for me.
- 64GB. Nice, but I don’t use my existing 32GB. If I did, I’d definitely need more.
- Temp sensor. Don’t care unless they do something more useful with it for me.
- Crash detection. Not a priority - have on phone.
- Did I forget anything significant?
Ultra‘s action button is potentially intriguing to me. Will see after using it on the new iPhone.
So, I see a lot of nice changes that I’ll eventually get when a new model does some thing exciting enough to drive me to upgrade.
I‘d also likely upgrade more often if I bought the less expensive aluminum/gps models, and this might have been enough to entice me.