There is no 1:1 mapping between subreddits and lemmy instances, so even the very tiny ones can be mirrored. The main bottleneck is actually on the lemmy side,

There is no 1:1 mapping between subreddits and lemmy instances, so even the very tiny ones can be mirrored. The main bottleneck is actually on the lemmy side, as I am having to create most of the communities, setting out rules, etc.