It's still very new but I think it's a great framework to build on. I do worry about fragmentation (each instance having its own gaming community for example). And the smaller niche subreddits I followed will be hard to replace / replicate here.
I am amazed how fast this platform has grown in a few days. Quite exciting!
I agree for the questions and text-based posts, I don't see a point in copying those out of Reddit since we cant interact with the OP. News and links can be useful in certain cases. I'm currently subscribed to Lemmit's gamedeals and buildapcsales - once their equivalents on Lemmy grows and matures I'll unsubscribe from those Lemmit communities.