On comments: they could solve a shitload of the complaints about comments by just adding meta-votes, like those on Slashdot, and letting individual users define their own filters for what they do and don't want to see. Automating and letting the community manage itself would be so much more efficient and fair than relying on mods, or the extremely vague and unhelpful generic vote button.
Sites classified as "general news" (ordered by frequency in the front-page archive): nytimes.com, bbc.com, bbc.co.uk, theguardian.com, washingtonpost.com, reuters.com, npr.org, cnn.com, slate.com, vice.com, latimes.com, cnet.com, yahoo.com, sfgate.com, cbc.ca, cnbc.com, guardian.co.uk, bits.blogs.nytimes.com, vox.com, salon.com, time.com, nymag.com, telegraph.co.uk, boston.com, newsweek.com, chronicle.com, msn.com, axios.com, news.com.com, propublica.org, independent.co.uk, timesonline.co.uk, mercurynews.com, theglobeandmail.com, pbs.org, theintercept.com, usatoday.com, buzzfeednews.com, spiegel.de, rollingstone.com, thestandard.com, go.com, smh.com.au, cbsnews.com, abc.net.au, nbcnews.com, seattletimes.com, aljazeera.com, bloombergview.com, motherjones.com, firstlook.org, thehill.com, apnews.com, informationweek.com, news.com, thedailybeast.com, huffingtonpost.com, theage.com.au, csmonitor.com, nwsource.com, japantimes.co.jp, thestar.com, bostonglobe.com, dw.com, indiatimes.com, nypost.com, ap.org, chicagotribune.com, sfchronicle.com, dailymail.co.uk, news.com.au, foxnews.com, kqed.org, theatlanticwire.com, scmp.com, texasmonthly.com, wbur.org, yahoo.net, swissinfo.ch, nationalpost.com, spectator.co.uk, sfweekly.com, detroitnews.com, theweek.com, nzherald.co.nz, washingtonexaminer.com, aljazeera.net, cbslocal.com, nltimes.nl, weeklystandard.com, ctvnews.ca, miamiherald.com, nydailynews.com, thetimes.co.uk, dallasnews.com, startribune.com, bostonherald.com, euronews.com, kuow.org, themorningnews.org, upi.com, globalnews.ca, guardiannews.com, theherald.com.au, thesun.co.uk, belfasttelegraph.co.uk, houstonchronicle.com, ibtimes.co.uk, koreaherald.com, metro.co.uk, mirror.co.uk, seattleweekly.com, standard.co.uk, dailyherald.com, huffingtonpost.co.uk, huffingtonpost.com.au, huffpost.com, inquirer.com, ktvu.com, ocweekly.com, sundayherald.com, theweek.co.uk, wpri.com, wtsp.com, americanchronicle.com, annarborchronicle.com, augustachronicle.com, catholicherald.co.uk, dukechronicle.com, heraldsun.com.au, katu.com, kdvr.com, kfor.com, ktla.com, myfox8.com, myfoxdc.com, myfoxny.com, news-herald.com, news.google.ca, pressherald.com, thechronicleherald.ca, timesherald.com, wttw.com, wtvr.com, wunc.org, wvgazette.com.
This is based on downloading all archived HN front pages from 2007-02-20 through 2023-06-21 and analysing stories by title, site, votes, comments, and submitter.