Context Collapse is the phenomenon in social network graphs when there are multiple audiences being served by the same communication channel, leading to an increased quality bar for engaging with the network. This audience problem causes abandonment of mature social graphs towards new social graphs as a way of starting fresh.
Blockchains are immutable and public, so we must be careful about the data stored on them. Social networks are the next opportunity for web3, but given their different data storage requirements only limited data should be stored directly on-chain.