The top three:

1. Lack of content
2. Lack of content
3. Lack of content

And as a subset of that:
Lack of people to follow/difficulty to find people to follow.

We keep beating the same dead horse and having these byzantine discussions, when it's perfectly known.

And I'm not even going to go about how literally none of my friends and family will get on even if the content is there, being 99% English only. nostr:note10vxepuvh8ksuagvxep0m6zdnunj9tnjdgw9kpg73lx4tc95pgx8sell6ep