For example, this question from 2015.
Now I assume this is because it doesn't have an 'Accepted' answer, but it's so old that
- OP is long gone and unlikely to ever resolve it.
- It's an old question so edits or other action may be a bit unwarrented.
Is there currently a system to close or otherwise file away such questions? Does making them as historical help?
How do other SE sites handle this?
Is this a feature-not-a-bug?