There is an observable usage pattern with StackOverflow that people monitor the newest questions and answer only them. So after the initial flurry there is very little activity on a question. Generally that is fine, but some types of questions have answers that change over time (what framework is available for X, for example), or might have better answers if got the attention of the newer members of the community who weren't around when it was first asked.
The problem with asking a new question is that it very quickly gets closed as a duplicate. So perhaps there should be a way to resurrect old questions. The most obvious way would be to have a question closed as a duplicate cause the duplicate to become new again (with perhaps some exceptions based on number of votes on answers, or the number of answers).
Another might to allow someone with sufficient reputation to resurrect a question.
Any other suggestions?