It might be too soon to ask, because for plebs like me, I'm only at the very beginning of learning Lightning-related stuff. And for SN admins like @k00b and @ek, the consequences of things playing out have only started.
But with that disclaimer, I'm very interested about the practical learnings that have emerged from this -- it seems like there have already been a whole bunch. It can be anything, from the sociological to the nitty-gritty tech. And if it's too early to post here (or you have no appetite to talk about it any more for now) I hope you'll consider posting later.