I am just a relatively new user, so please correct me if I'm wrong.
If you read about the questions with most votes in MSE, you can find that until the $35$-th of question, the questions are all asked at least 4 years ago. Some of them are even about 8 years ago.
Does this mean new questions can't receive enough attention?
One of the reasons of this phenomenon, is, I think, is about the 'hot topics':
Classic results like Different methods to compute $\sum\limits_{k=1}^\infty \frac{1}{k^2}$ (Basel problem)
Some explanation to some important concept in mathematics, such as
Is $\frac{\textrm{d}y}{\textrm{d}x}$ not a ratio?;
What are imaginary numbers?
Or some 'interesting' results like Is this Batman equation for real?.
And interestingly, some of the problems are really off-topic, such as My sister absolutely refuses to learn math.
Does this mean oftenly, receiving many votes and attentions really doesn't mean it is a good question?
Are our users really focus on wrong position?
We should not just pay attention to familiar topic, or 'hot topic'.
Does it means we should revise our MSE system?
Maybe it is because we have lots more questions these days and so the average attention of problem is decreasing. But I think the number of good quality posts won't decrease.
Maybe we can let moderators or expert users to select good question (for month, years, or etc.?) Somethings like votes shouldn't be the most important.
Thank you for paying attentions to my question.