HN is a /timesink/. It is easy to dump a v. large amount of time there, without a great deal of energy expended. Much like heatsinks, this comes with advantages

HN is a /timesink/. It is easy to dump a v. large amount of time there, without a great deal of energy expended. Much like heatsinks, this comes with advantages (less free-unthinking time) and disadvantages (can suck time away).