Strange because I find that it's full of day-0 beginner questions and little of in-depth niche, thought out ones.

Like "Where do I start with machine learning?" often with bad spelling, or "Do you need to be very smart to become a programmer?" etc. By contrast, Reddit, the StackExchange sites and HN are a totally different league.

I used to love browsing Quora, and found a lot of answers fascinating. However, in the past year something seems to have changed. Now I get really spammy suggestions, and there is rarely new content on my feed. I get the same suggestions for days.

I don’t doubt that the good content is there. I think their algorithms just changed and now I don’t see it anymore. Not willing to put in the effort to figure out how to get an interesting feed again.

In my experience it was quite good for a while, then they made a couple of changes and suddenly the feed was rendered absolutely useless. After more than two weeks of the feed showing me the exact same questions and answers every day with only 1-2 new ones inbetween I stopped using it.

And at that point they had changed parts of the site so much I couldn't figure out how to subscribe to new topics because all of them were replaced by user-created topics/groups like on Facebook(at least that's how I understood it).