Comment by abricq
If you care fairness, I have 1 extra suggestion that you might be interested in.
It was proven by several data-science research that when users have to votes (or give ratings) and if they are able to see the previous result, then the first few votes have an extremely important effect.
For instance here is one stury, very well written article by a famous teacher Robert West, "of sheep and beer" https://dlab.epfl.ch/2017-08-30-of-sheep-and-beer/ which describes this effect on beer-rating sites.
One way to overcome this effect is to hide the votes until enough votes were collected (eg more than 50). Another way is to hide votes until you have voted yourself.
You can see a form of this effect on HN itself, in particular in Show HN topics.
First few comments basically set the tone of the discussion and its dynamic. If they are shallow, negative or dismissive, the discussion gets stuck and takes a while to recover even if the submission has a lot of actual merit.