I've learned more about the real world around us from Quora than I have from almost every other source. Only Stratfor rivals it, and that's only in the realm of geopolitics.
Of course, you'd learn more at an actual military academy about strategy, but Quora does the work of getting the people that already went to those academies to boil down everything they learned into short, readable essays.
In fact, I'm finding that I'm reading fewer long-form journalism articles and blogs because I find Quora so compelling. Those were my previous bar-none best source for information.
Nothing beats curated long-form journalism for variety, but there's still a lot of noise and the work of separating it out is onerous enough and Quora is easy enough that I've already subconsciously switched, not bothering to maintain my RSS workflows. If I want some variety, I'll fire up Feedly or Pocket and pull out a few articles, but generally I'm looking to iterate on my high-level model of how the world works, geopolitical analysis from Stratfor and watching smart people answer stupid questions at Quora is the best bang-for-the-buck I've encountered for that. HN is the best place for business-specific information, if it weren't for that I'd have moved on a long time ago, I've been so far unable to find a good vein to mine for business on Quora, though it's half-decent with finance, though HN still beats Quora there too.
I've read enough about real-world military strategy on Quora to know that this is nonsense. The amount of national resources that go into command and control networks is immense, these networks play a huge role in making our military unassailable. Something like the Bugger hive queens would be practically impossible to deal with in any real way, deception would be impossible to rely on.
Deception is critical in an invasion, defenders have the advantage of knowing the terrain. If you could rely on a sensor network to reliably and instantaneously tell you where all the threats are, then you could simply rely on mobile forces to go wherever they're needed. Unless the attackers have an overwhelming numerical advantage, they won't be able to break through.
D-Day would not have been feasible without the ability to deceive the Germans as to which beaches they were going to land the troops, a lot of time and effort went into planning that deception.
Humans only stood a chance against the buggers due to their overwhelming weaponry, which will trump tactics and strategy every time. No way with that kind of weaponry would it even be a fair fight, any mildly competent general could have won with that advantage. The defensive response to overwhelming conventional superiority is guerrilla warfare, not trying to stand and fight toe-to-toe with nukes.
Felt like a bit of a cop-out to me, authors should be required to spend some time on Quora verifying their basic assumptions, it would make for much better stories. Naturally Card didn't have access to it, and I still enjoyed the book. But it could have been much much better.