in reply to Why upvote a node?
The whole thing started with 'voting system'. Why it was started in the first place? My guess: To encourage monks to participate and show that 'their' content could be liked or disliked by others. Thus it retains the motto of the community .
The side effect: We are occupied in the acitivity to decide what is good and bad.
We can make it better by creating system that where you can share more knowledge and get more knowledge easily that can be useful to you. After all, history or the current times has less values for your votes. It acknowledges or remmebers how much you have contributed with the available knowledge.