Our site is for all* tabletop role-playing games, not just D&D 5e.
It is true that D&D 5e questions seem to dominate the questions on our mainsite (Role-Playing Games StackExchange) for the past few years. The game is popular and its rules contain many ambiguities, therefore there are many users asking many questions about it.
However, our stack is for all* tabletop role-playing game systems. We also have questions that are not specific to any system, and deal with social issues and broader techniques.
* (There are some exceptions, a few niche games that are considered too inappropriate to discuss and we don't want to give them publicity.)
How to filter questions according to game system:
Questions can be sorted by tags, which are written in bracket notation. If you check the search bar on the mainsite, you should see some prompts for suggested tags. For example, searching
[fate] will search for questions related to the Fate system.
You can also exclude specific tags from a search, with a hyphen prefix. Entering
-[dnd-5e] will ignore all search results that are tagged as
Lastly, you can customize filters to ignore certain tags. On the main page, look for a box titled "Ignored Tags". If you enter a list of tags here, then the mainsite will hide all questions with any of those tags. You can also use wildcards to include a broad category of tags. For example, ignoring
[*dnd*] should hide most Dungeons & Dragons questions from your display.