I had a similar impression in the beginning, but I also had an opportunity to test it. While it is hidden from new users, it is technically possible to post comments requesting an update on the question. However, when I tried that, I was mostly ignored or politely answered that the solution is still not found or already forgotten. I also had a taste of the same from the other side: some people tried to contact me directly via the contact details in my profile. I found it rather annoying that I was distracted with random questions. Many technical questions require quite specific knowledge. It made me realize that the Q&A system here is more efficient: it is possible to actively look for the questions to answer when you are ready to answer them.
If you did not post your question here yet, then you do not know whether the community here can answer, unless you found the same exact question asked already and not answered. If you find an answer elsewhere, may be in a subject-focused forum or Internet-chat where they love to hear and discuss the matter, then please come back here and post the answer! It appears from your post that it is what you expected the author of the question to do. This is the right thing to do here, but no one can force anybody to do this. There might be different reasons why they don't.
The community here is focused on finding solutions to problems, not discussion. Please note that the comments under the posts are intended for refining the questions and answers respectively, not for discussion, so don't repeat my mistakes by asking for an update.