Are questions asking something like "Do any game engines support feature X out of the box?" off-topic? Or do these fall under the "which technology to use" category (or some other category)?
The actual question is a yes-or-no question, which we know to be bad. The implied follow up is "okay, which engines support this technology?" which is, I'd argue, pretty clearly a "which technology" question.
But even if you disagree with that, it's a list-generation question, which is too broad.
So I think we should close these.
I think these questions are tricky and should be handled on a case-by-case basis, but should be closed more often than remain open.
First of all, because the answer can very easily be "No", which doesn't make for a very good answer. Or they can be "No, but you could try...", which can easily get into a back and forth about how you might tweak technology Y to work for feature X. Or generate a list of plugins or libraries that add said feature to a specific technology.
I think it'll be less likely for the answer to be "Yes, technology A and B support it and no others". This would be a very definite answer and likely pretty rare.
Since I see far more of the answers being the wishy-washy type, I don't think these questions are a good fit for the site.
Fundamentally, these questions are not good QA site questions for the same reason shopping questions aren't allowed on SuperUser.
[T]echnology moves so rapidly that the best shopping recommendations will be utterly obsolete within a year! What’s the point of a bunch of labor intensive questions that provide only temporary benefit to a limited (some might say Too Localized) audience? There isn’t any.