Last year i see how many social media platform failed to start good project.
I dont know technical reasons but i see how projects die with dumping price on exchanges.
Maybe our blockchains even young and slow for this type usabilities.
it's still worth using, but can't compete with social media that is already popular. although blockchain-based social media is safer, people still don't really understand how it works. so for now I don't think it will be popular but in the future maybe social media like Facebook or Twitter will be inspired by the blockchain.