Upvote and downvote is a great system provided it shows both and doesnt reduce it to positive or negative only.

The system is meant to show good content from bad content, by showing the total amount of up and down votes. Reddit got rid of that system years ago and just showed the sum of votes which is where the “hive mind” mentality came from. Used to be you’d see a post with dozens of upvotes and downvotes and it would tell you that the content itself was usually of high quality, it was just a controversial take. If a post had 450 downvotes and 400 upvotes you’d know they were speaking for about half of the site, whereas if it only shows “-50” you’d think they are a huge minority.

As long as karma doesn’t exist and the total amount of all votes are displayed, I think it’s a far better system than just showing every comment based on it being recently posted. If we did that you’d have spam everywhere and you would have to dig through a dozen low effort comments to get the best engagement.