- It was done non-democratically, unlike other feed suggestions. One user suggested it and another user immediately added it with no additional discussion.
- It was done by a PPCG user with sub 1000 rep. Yes they are a mod, but not on Programming Puzzles & Code Golf.
- XKCD has no specific association or relation to PPCG or code golf or Stack Overflow. Their topics overlap, but the same could be said for dozens of webcomics.
- Anyone who actually wants to read XKCD will probably continue to do so at its main site. There's no need for us to be an XKCD mirror. It will always be possible for users to post particularly appropriate comics in chat for discussion.
Do we want every single future XKCD comic autoposted in chat?