None of this is to say that I plan to run Dwimmermount forever.Why not? I answered.
Look. One of the big gripes I see over and over again it lack of time to do everything you want. I roll my eyes at some of friends who run games that they put a lot of effort into only to ditch everything and start over for the next one.
I am not talking only about the hours before a game; writing up an entire key for a adventure or a 2,000 year history. I know not everybody does or likes doing that. Some do everything by the seat of their pants. What I am including are the hours you spent refereeing.
There are mountains of gold in the stuff that you and your players come up with each session. Stuff there is no way you will get to in the current campaign. Stuff that would make for some great adventure for the NEXT campaign.
That the secret to having a setting with depth. That when you play a genre you stick with the same setting you used before. That you use what you did the LAST campaign as the foundation for the current campaign even if the current campaign is has a completely different focus. And you get the added benefit of happy players who see their actions have an impact on the setting.
You see the secret is that a setting is an entire world. Look at the diversity our planet has in a sphere of roughly 8,000 miles diameter and 75% water. The setting you create can have the same level of diversity. In some distant corner there lurks the place where you can run the sub-genre you want.
And if you can't find a good physical place what about a different time? If you want to use 2nd edition Runequest with it's emphasis on Mythic Heroes then set it in the dawn ages of your world. Use what the player did then as the history of that time. Dragon Pass and the Plains of Prax are not big places as regions go.
For example James Dwimmermount campaign has a backstory about the Thulians (sp?) an ancient powerful magic using race/culture. If he wants to run Runequest 2nd edition then he can hone Dragon Pass/Plains of Prax to fit during a time of their rise. Or perhaps take Stormbringer and set it during their fall.
If all you do is play one shots campaign then make more work for yourself and you miss out one of the most compelling aspects of Roleplaying Games. Their ability to immerse your character in another place and time.