Some examples:
- Show cart page in a popup on add to cart action
- Full Page Cache on CE 1.8 - An FPC Magento Module? Varnish? Both?
- Pre-Warming the Magento Enterprise Full Page Cache
- Is Magento the right platform for 1M products?
I've been a long time SO user, and questions like these are usually quick to be closed (partially thanks to the cv-ring) and I think they're bad for the site's health.
I don't think questions about broad topics, or require writing an entire module as an answer belong here. I know we're all here to help people learn Magento, but I believe we should be directing things like this to a forum/reddit/twitter/etc.
Take from the FAQ:
Not all questions work well in our format. Avoid questions that are primarily opinion-based, or that are likely to generate discussion rather than answers.
Don't ask about [...] Questions with too many possible answers or that would require an extremely long answer
I've flagged/vote-closed a few questions out there, but I wanted to bring up a few examples and see what the community thinks.