If I understand right, you can respond to a post if you arrive at it through your instance that you’re logged in to. If you find a post through Google or another link, you can’t just click “reply” - you have to find your way back to the post through your server.
I’m sure the devs are working on cleaning up that experience. Sounds complicated.
Personally, I like it here and will probably stick around. I hope the servers can scale, and that new communities grow.
I’ll still wind up looking at Reddit for meme content until it turns up here. There’s a lack of goofy pointless shit here currently.