Not sure how upvoting will make search better. Most of the search happens in a specific context, where users are just desperate to go to the desired result and

Not sure how upvoting will make search better. Most of the search happens in a specific context, where users are just desperate to go to the desired result and not come back and vote on stuffs if it is relevant. Plus, even if it is done there is no way to know if the page is still relevant since the upvoting.