Yes, we're aware that Lemmy exists, and we're happy to see this community doing well. :-)
I won't be on reddit too much moving forward due to the API fiasco (plus I was more of a lurker the last couple of years anyway). I'm hoping to pivot more into Lemmy. I think since of the other mods are also on Lemmy, but we haven't had much of a chance to coordinate, with all that's been happening recently.
Edit: in fact, I just realized that I was the one who created this Lemmy community! Lol
I'd be happy for r/asoiaf to migrate to Lemmy, but first impressions are most important. If this site gets linked from Reddit and it's totally devoid of content, people will write it off and never return. I'm hoping to do my part by starting a weekly post series reviewing some of the most interesting theories, but i think this place needs daily posts getting 10+ comments before we should ask the Reddit mods to publicly endorse a migration.