This sounds promising. I'm worried about two things: 1) Will a minimum number of endorsements lead to groupthink? Will a substantial, polite but unpopular comment still get endorsed? 2) If this works initially and improves comments immediately, could it have negative long term affects? Will new users find it confusing or intimidating? Will people comment less knowing that others are less likely to see it? And one que…
I believe it will likely kill decent and valid discussions. HN already is a little disconnected from reality sometimes, with this we will end up with a fake consensus. Besides, it will become harder to attain 1000+ karma, so we will be endorsing a small group of people of old users and will be unwelcoming for new folks.