My current algorithm of asking questions on StackExchange when I don't know if there is an appropriate site is the following:
- Try searching is there is already beta or graduated SE site for the topic. If there is, ask there;
- If not found, try searching on Area51. If the proposal is found, add (unless duplicate) the question there as an example question, expecting that the question may finally migrate to beta someday;
- If there are no matching proposals (existing or abandoned), create a proposal, then add my question as the first example question.
[4. If the algorithm fails, like now, ask on Meta where to ask].
In any case, I don't like my curiosity being stopped by obstacles without a change being fulfilled.
But the "commitment" phase seems to be a trap: the gathering examples "vent" is closed, but beta "vent" is not yet opened? But where to ask then?