I peruse both Coffee and Seasoned Advice daily. Even since the inception of the Coffee site, I frequently see coffee questions on Seasoned Advice. Coffee is on-topic at Seasoned Advice, but it's MORE on-topic here!
I assume this is because users (new and "seasoned") simply don't know there's a dedicated Coffee site! Every time I see a coffee question on Seasoned Advice I comment on it (and sometimes answer) to encourage people to join us over here at Coffee. Some recent ones... this one from today, and this one from a few days ago that got supercollided and got an inordinate number of views... and another that spurred this answer to a related MetaCoffee question. All would have been very welcome over here at Coffee! :)
Clearly, we're not going to migrate previous SA questions about Coffee. I also understand not wanting to immediately migrate new questions because of this "policy" (which I view more as a suggestion); i.e., don't migrate a coffee question, because Coffee is on-topic at SA.
I think this is significantly impacting Coffee.SE's adoption and relevance. If we had all of the New Coffee Questions over here at Coffee, I think we'd have a much better chance of getting off the ground.
How do we get people to ask Coffee Questions here instead?