Comment # 38 on bug 953522 from Michael Schr�der

Wait wait wait, why would you want to make "onlyRequires" the default? That's
just an option, most people IMHO do not want that. It's only useful if you want
a somewhat "minimal" system.
So I think that the current code is what we want.

(I'm also unsure why "installation" would need to set "ignore already
recommended" to false. This option is a noop for fresh installations. It only
makes a difference if installed packages are kept, i.e. not updated)