> Defeating cost threats ("run your own software like a 'megacorp' "): If you mean "run your own email server and decentralized social service node", you don't

> Defeating cost threats ("run your own software like a 'megacorp' "): If you mean "run your own email server and decentralized social service node", you don't need high performance (note that you are still reliant on a third party to host your stuff anyway...). However, email in particular requires careful setup and maintenance, it's definitely more a problem of convenience than anything. Also, most people are not motivated enough to do that, even in the tech community, and existing social networks/IM systems have a huge network effect at that point.