I am running archlinux which would normally be light, but unfortunately I work with a lot of different programming languages and prefer different tools for each. I did not deduplicate any of the manpages. The number of packages that I have installed, listed by `pacman -Q|wc -l` is 1241.
I agree that it would be nice to have a single place to go to get all of the details, but I think manpages suffer from more than just examples. I think that someone just starting *nix is likely to look online. While you can search manpages with apropos or man -k it doesn't search the whole document and people just starting don't know the terminal commands to search more.
I would rather have 2 commands and have all of the information than just manpages that don't get frequently updated.