As mentioned by others, security updates and the camera. If the right 'phone comes along at the right price, then is when I'll consider doing the upgrade. Upgrading when the latest greatest 'phone is released is something I would never consider.
Personally, I think they peaked with 'Star Trek: Voyager', although I must say I never liked the character 'Q' in any generation, and even now when I re-watch Voyager episodes, I will always skip the 'Q' ones.
On my Android 'phone I just use the official app from the Play Store, it fulfills my needs. There are no ads, which was the reason I wouldn't use the official app for Twitter.
Be nice to everyone, from the receptionist upwards, and if you're offered a cup of coffee/tea, offer to wash the cup yourself afterwards. Little things that show you're thoughtful.
I used to have the vast majority of my domains with Gandi, but over recent times, I've favoured Porkbun and most of my domains are now with them. I used NameSilo for a while, but their prices aren't as competitive as they once were. Tried Google Domains for a short while, but was concerned if I was ever to lose access to my Google account, I could lose access to my domains.
The next day, and still getting logged out.