While Tor, I2P, GNU, and Namecoin were working an RFC through the IETF process, Facebook and Tor/Appelbaum broke away from the group.
Why? Because they were bigger than the rest. Facebook was too important to wait for the piddly-little anonymizing projects, like I2P.
Tor was just too popular. That was the basic argument.
They broke off their own RFC, got it approved very quickly, and facebookcorewwwi.onion went live in 2016, complete with an HTTPS certificate.
🧵 /5