My previous US passport had over 200 pages, but I'm still sure there must be people who have more. When I would run into a consulate that refused to add more pages, I just said "no problem" and went to another consulate who would. As someone posted above, Hong Kong used to be good for this. Shanghai and Amsterdam too.

My current passport is at 96 pages and while it's probably harder to add pages these days, I'm sure I could find some consular officer somewhere to pop some more in if I end up needing it.