Upload & Sell: On
I in theory still own a 70-200F4 (It is on 'semi permanent loan' to my godson - aka I gave it to him so long as I can borrow it back), and have the 70-200F2.8. Whenever I know I'm going on vacation, I really wish for the F4 unless it is a serious photo vacation, or I'll be working 'from the car'. That 2.8 is HEAVY. On a crop body...
On a crop, the 16-35 is a great lens, and there are/were times I wished for wider, just as there are times I wish for longer than my 400. I solved THAT issue by adding a full frame (other than my initial kit lens, I never bought an EF-S lens, because I KNEW someday I'd want a FF body)