I just thought of how to do all those things in Discourse, I’ve seen theme components for the image gallery, and I have enough of an understanding now to do stock tickers if I wanted to. The only thing I don’t know about the NBA one is where to get the info (I don’t know anything about sports, I’m sure there are credible sites who keep track of this in real time with APIs people can use, assuming the main NBA sites don’t do this for you all-ready) but it would work the same way as the stock tickers.
I think many people have realized with the recent Reddit Armageddon is that as nice as it gets or was, you don’t really own your community or content when Reddit can reopen your Subreddit and change the mods.
So the push I’ve seen from big Subreddits to move to their own discourse sites has been great.