You’ll be fine if you keep an eye on how many photos you have on your device. I’ve been using my iphone for 3 years with 64GB and it’s just enough for me.

When I’m going to buy a new one, I will buy one with more storage to avoid storage stress. But you can live with 64GB or 128GB if you send a lot to icloud (or any backup service) and delete old stuff you don’t really need.