I was somewhat surprised to discover that the proposed SE site Magic:The Gathering has now recently moved into the commit phase. I am surprised because to date I have seen no compelling argument for a separate site for this specific card game, and some excellent arguments in favour of asking these questions here.
We have 71 MTG questions here, out of 1040, over 6% of all questions. And Magic is the most popular game on the site!
I strongly believe a second site will fracture the community we have been working so hard to build here. I believe the game falls squarely under the remit of Board and Card Games. I don't believe a separate site buys Magic players anything they don't already have. I also think running a Magic beta opens the floodgates. What about Dominion, or Chess, or Go, or Poker, or...? Should they all have separate sites too?
I don't understand the logic behind allowing this proposal to proceed.
I think that both Gaming and Stack Overflow itself provide strong evidence that multiple orthogonal topics can coexist very well on a single site. Gaming appears to work just fine, despite being dominated by questions on Starcraft 2. Nethack, a game at the complete opposite spectrum, has a healthy following and high quality answers. Stack Overflow works well, despite the fact that .net and Python programmers have almost nothing to say to one another.
So what is the rationale for a separate Magic site? Shouldn't the proposal be closed? Do the SE overlords really intend to launch a Magic beta?