I have some uses for USB-C, but I also have so many lightning accessories around the house for my iPhone. My partner and I both have iPhone 14 Pros. I regularly connect my iPhone to my monitor with HDMI and an HDMI adapter, would be nice to just use my USB-C cable and get better quality along with charging. I also connect my DSLR to my iPhone to save photos, I can't say for certain, but I'd imagine USB-C would transfer these files faster. I also wouldn't mind the lighter weight, my brother has a 15 Pro, it just feels so much lighter in comparison.
On the other hand, my 14 Pro still feels brand new to me, I really don't need to upgrade it for a couple years. What it will come down to is what features the 16 Pro does that my 14 Pro cannot do, and see if its worth the upgrade from there.