This depends very much on the subreddit. There are still some fantastic communities with top-notch discourse! On the other hand, I don't remember discourse being worthwhile on large subreddits even in the good old days of 2015.

Unfortunately doubly true for their crytocurrency-themed subreddits with millions of followers where each and every post that isn't about 'number goes up' gets moderated. Even a post got deleted where the user warned others to invest carefully, only funds that they don't mind losing. Or posts where a user posts a proof of their losses.