While this is a very good idea, we need to be very careful with what we migrate. Although many of our off-topic questions, as per one line of their faq:
Using or administering a *nix desktop or server
we should not migrate every mint question, for example. We do spot some diamonds in the rough, however, like the LibRRadius and PAM question illustrated above, and they can be migrated After all, our goal is to get questions answered, and if the question is very likely to be answered at [unix.se], let it be so.
They also post:
If your question applies to Ubuntu only, or you're looking for answers that are Ubuntu-specific, you should post it on the Ask Ubuntu Stack Exchange site. If your question applies to other distros or you welcome more generic solutions, you're in the right place here.
So Mint stuff can be migrated, but I fear that it may be frowned upon by the Unix.SE community to begin getting many migrated posts.