Another three years has passed. Time for another thread bump.
I've yet to get above 100 GB used on my iPhone XS (currently at 73.6 GB), so a 128 GB option would (again) have been totally fine.
Imagine that! After all this time, I still don't have a 128GB phone. Yeah, I went from 32/64GB to 256GB, but this thread is about a 128GB iPhone!