I find the garbage vs interesting content to be not great on Twitter, especially lately with the lack of moderation. The important tweets will make it to HN or some sun reddits after a few hours.
Maybe Reddit (I avoid it), but there's no question HN misses 95% of what's happening in ML, maybe more. The 5% it gets isn't even the good stuff.
As another anecdote, I've had the opposite experience w.r.t. moderation under Musk, it's way, way better for me. Twitter is roughly back to where it was in 2016.