I'm just curious (and sometimes annoyed) that, it's sometimes really hard to tell whether a question is being solved by someone, or just forgotten by the community. Especially, when a problem is hard to solve, it could take weeks or months without knowing anyone that is working on it.
Someone would say, you're going to place a bounty on it. I don't really think this is a good way. Placing a bounty might be a waste of "precious" reputation for new users. And due to the difficulty of the question, some posts could still be silent even after a bounty.
Should we encourage people to comment their current progress, or some other ways are suggested? Or can we add a "Working on it" button to tell us someone is solving the question?