Exactly what happened to me.I have the same dilemma as the OP, I'm planning to upgrade from iPhone 12 128gb to iPhone 16 Pro, but should I stick with 128gb or increase to 256gb? After 4 years, I only use 86gb, so I thought maybe 128gb is enough, but when I read your post, hey we have the same thinking. Maybe when I have the 16 Pro, I should start taking more photos and videos, why buy 16 Pro if you're not using the using the camera function isn't it? I might just add extra $100 and go for 256gb. Better have it but don't need then need it but don't have it.
Love my 256GB 16 Pro.
Started taking more photos and playing with 4K 120Hz video...