I just asked this question which, predictably, caused some discussion on whether such questions are allowed. It was rightly pointed out that such discussion should be had in general on meta.
So here it is: does History.SE have a policy against softer questions, or against questions with more than one answer? What about questions that specifically ask for more than one answer?
If there is, as the mods seem to suggest, such a policy, should there be? I would say that my question provides a good use case for when such questions can be a useful resource, as well as a fun exercise. I'd also argue that the SE format is well suited to such questions: in particular the voting mechanism can help to sort through a large volume of decent answers, to find the few real gems.
This purpose is not served by chats or forums. Like all SE questions, the aim is to create a presistent resource, that people can add to or benefit from over a large period of time.
I'm not really active in this community, so I don't have strong feelings either way, but I thought I could create the meta topic at least.