We have some canonical question posts that work to answer multiple questions that are frequently asked with just enough variation to keep open as separate posts. For example, creature design. Or perhaps it was just proposed here?
We most certainly do have frequently asked questions here, just not a FAQ. These are questions that are very common but not things you can just say are the same topic. For example:
- Is my map realistic? (We'd benefit from a post pointing people to mapbuilding concepts.)
- Is this species I invented realistic? (A post about biological constraints would be useful.)
- Can a X ride a Y?
- What should I bring with me if I'm time-traveling?
Some common questions do get closed as duplicates, others because they're too broad or opinion-based, others because they're badly written. And many stay open.
A set of how-to-worldbuild posts would be extremely useful. As would a community post that was a list of pointers to other places around the internet that addressed these common issues...and pointers to existing posts here on WB that did that, since some have turned out to be comprehensive. List posts are discouraged here, but sometimes they're useful and, if done as wiki, should work well.
Each Stack Exchange site does it differently. Over on Genealogy, I'm working with someone to write some canonical posts about interpreting DNA results (because we find ourselves saying the same thing over and over). The idea is not that we'd necessarily close new questions as duplicates (though we might) but that we could have a post to point to for the basic answer, then give a short addendum about the specific case.
How do I get started with Worldbuilding? is a question that would never fly here. But as a canonical post authored by community wiki, it could be an extremely useful exception.