How would audio/video format solve the problem though?

A lot of communities have been moving to chat platforms like Discord, Slack, etc. They definitely help to get a faster answer.

But in any case, responsiveness depends on the community health and on how well the question is prepared and clear.

I see your point on the small communities using slack, etc. Although I am also part of some of them, it is insane the number of members, they have and the low interaction some times (in line with your responsiveness point) I figured that audio/video format could play a role as for users who are willing to allocate 30min to 1hour of their time to give their opinion and get answers straightforward

I sometimes ask on Usenet or on IRC. IRC messages may get lost (although they may also be answered more quickly if there are enough users); Usenet messages are unlikely to get lost (although they may expire, someone will probably still have a copy, and in general you can still post a follow-up message to an expired article). But to try to more likely to get an answer, would be asking in more than one place, I suppose. (I think that audio/video would make it worse, though; text format would work better for these kind of things, I think.)

My only issue with IRC is that if I don't have something always running to log messages, I'll lose anything as soon as I kill the client. Which means I could ask something at night, go to bed (I turn my PC off then) and never no if someone responded.

Yes, if that the client does not itself automatically log messages, nor if the server does, or some log bot; some people say that IRC doesn't support server side logging, although actually it is the protocol which has no standardized way to access it, and an implementation easily can do so (you could mention the way to access it in MOTD maybe, or mention the relevant HELP topic in MOTD). (Private messages probably should not be logged by the server though, nor should messages on private channels or passworded channels, I think. Some implementations might only support logging for permanent channels anyways; I think I have once done that, but I lost it now.)

mmh, I see your point. audio/video rooms could be messy is none is actually moderating the quality or the responses. What if somehow you could lock the capacity of those rooms to make it of high quality for your interactions?

Wouldn't this devolve into people asking the same questions over and over?

Well, if you get the answer live from someone else, it resonates more with you

And even worse, you won't be able to link to previous answers

Truth is, how many people is actually reading previous answers? I only do on stack overflow, and it is very time-consuming...

Are you saying that reading an answer to an old question is time consuming?

All I am saying is that FINDING the right answer for my particular case is. I guess is the classic problem of too much information vs curation

Have you checked out Reddit?

Yes that would be good! Hate the experience to find the right channel or subreddit in which you need to write + all the different rules for each subreddit