I can't speak for others, but I seldom participate in craft threads for a variety of reasons:
1. My chops aren't that good, at least as compared to many on this board. Thus, I have little to offer in advice or learned opinion.
2. Craft to an author writing literary fiction is a completely different subject than those who write, say, dystopian fiction.
3. You want to start a fight? Post something about comma splices. State a position. Watch the fur fly.
4. I break just about every writing-rule you've ever heard of. As an example, I hate the word, "said," and try to avoid it in dialog. Many believe this makes me a heretic. I react poorly to being called names, and then the admins' have to get out the cattle prods.
5. If you subscribe to the CMOS, you know the number of revisions, changes, reversals, and contradictions therein. So even English language rules are constantly changing. Personally, I can't keep up, and don't care too. My readers seem to understand the story I'm trying to tell, and that's the bottom line.
Anyway, that's why I don't think you see as much craft traffic hereabouts. The subject tends to be like pizza, beer, and who was the greatest rock guitarist of all times - opinions vary. Well, maybe not the guitarist part. We all know that was Jimmy Page; right?