I just started playing with a few new Linux distributions, and noticed that a "base" image of openSUSE I was given doesn't have man pages installed out-of-the-box. I was under the impression that man pages were typically provided in most Linux distros as sort of de-facto documentation users could expect across the larger ecosystem.
So, as a newer Linux user, can I expect man pages to be there "as the norm", or does it truly differ from distro to distro? If it does differ, what are some of the tradeoffs distros consider when deciding to include or leave out man pages?