A sufficiently decentralized social network. farcaster.xyz

Question: Why was @farcaster the first (?) to successfully pitch "sufficient decentralization," when it so obvs makes sense? 

Was it tech issues? An ideological fetish for "full decentralization?"

Did "sufficient decentralization" just need a good name and a smart white paper, and Farcaster finally accomplished it?

ᴀᴜᴅɪᴏᴠɪꜱᴜᴀʟ - 𝚠𝚛𝚒𝚝𝚎𝚛 - 𝔅𝔢𝔯𝔩𝔦𝔫

https://lilinter.net
https://newmodels.io
https://channel.xyz

Curious if anyone else has proposed similar? And were they shipping anything useful while doing so?

While one is a protocol and other isn't, there might be some similarities between Mirror and Farcaster - allowing creators to cryptographically sign their content and decentralized off-chain storage with future portability across apps.