The karma system in itself is not what made this site interesting, not by a long stretch. While some very bad comments did make it through that now don't, Overcoming Bias before the karma system had interesting discussions as well.
The karma system is a key feature of what made LW what it is, but it isn't exceptional in this. Just as vital where the features of its demographics, the topics we chose, the norms and culture that developed. If any of those wash out LessWrong becomes nothing but a smaller suckier reddit.
The karma system in itself is not what made this site interesting, not by a long stretch.
That would indeed be a strange position for someone to take.
If it's worth saying, but not worth its own post, even in Discussion, it goes here.