Why was Why are there so many 2.1A usb chargers out there? Migrated to Ask Different, the Apple stack exchange. Op was not asking about apple products.
I really think this question should have been disposed of locally, without resorting to migration. Migration was meant as a favour for the question, not a punishment. By migrating a question, you're essentially promoting it to another site. It's like saying "Hey guys, look at this insightful question we couldn't fully answer here on EE.SE! I bet your site will benefit from hosting it, and perhaps your users will come up with good answers."
Whenever this question should be deleted rather than closed is another topic. I know it won't be useful for me (and I voted to close), but in general it's advised not to delete questions with upvoted answers, since someone deemed these useful. There's little harm from having it as long as it's never bumped to the active question list again.