I first thought I had broken my DNS filter again through regular maintenance updates, then I suspected my ISP/modem because it regularly goes out. I have never seen the behavior I saw this morning: some sites failing to resolve.
I thought Cloudflare was having issues again, since I use their DNS servers, so I started by changing that. Then I tried restarting everything, modem/router/computer. Wasn't until I connected to a VM that a friend hosts that I was finally able to access HN, and thus saw this thread.
Hopefully this will get fixed within a reasonable timespan.