It does some UDP fuckery to bypass NAT and firewalls

I wouldn’t be surprised if they use hole punching. It’s an old but effective technique which Skype famously used back in its heyday.

The fragrance of dark coffee from Phoenix Wright Ace Attorney (especially the insaneintherain cover: https://youtu.be/UBy5qquWcEg ).

PJ Vogt’s new podcast is called Search Engine and is a good substitute for Reply All.