I've gotten good information from Quora, but I would point to StackExchange for the highest quality Q&A in general, and especially for programming and related fields. It sounds to me like perhaps asking questions was overcompensated compared to answering.

If the highest quality answers were also the most well compensated, wouldn't that be the ideal situation? If you have a bunch of paid professionals standing by to answer questions then genuinely curious people might come to your platform to ask. I have no data to back this up, that's only intuition.

There are a number of people on Quora who post very high quality answers. There area a lot of people who post very entertaining but not necessarily authoritative answers. And then there's tons and tons of junk.

And while the good answers seem to get upvoted a lot (the ones I see at least, but that's an obvious case of selection bias if there ever was one), but plenty of terrible or even wrong answers seem to get upvoted a lot too.

... and almost no one will see those extremely authoritative answers because Quora wants me to make an account to read them ...