I find Reddit is still one of my favorite resources to search for help. If I need help on how to do some home DIY thing or help on making a particular decision, I'll Google for "how to decide blah Reddit" and I'll get much, much better signal than just Googling for "how to decide blah". In the latter case I'll get a bunch of ad-filled garbage and an article that was probably written by an algorithm.
Case in point, my original post, which was one of the first ten-fifteen comments, has a bunch of up votes. There's no way this would be true if I missed the original post by an hour or if it was the n'th response in a large comment chain.
But low-traffic SE sites just don't compete. I wish SE would change their account system and/or design so that their smaller sites became a better resource.
I want to edit posts on SuperUser too... but SE won't let me. Despite having enough rep for complete trust on SO, I'm a bit short of 2000 on Super User.
If I try to edit a post, it goes into a queue for review by high-rep SU users. But there aren't enough of those, because the site is lower-traffic. So it takes hours to review. High-rep SO users, of which there are MANY, cannot contribute to this queue.
The questions and answers and culture between Stack Overflow, Super User, Ask Different, and their other "tech" sites are essentially exactly the same. There's no reason I couldn't contribute to any of those sites. But their multiple account system makes it impossible.