"Now that their open source data stores manage hundreds of terabytes or even petabytes of data for thriving Web 2.0 and cloud computing vendors, switching back is neither technically, economically or even ideologically feasible. “Web 2.0 companies can take chances and they need scalability,” said Johan Oskarsson, the London-based organizer of the NoSQL meeting and, like most of the other attendees, a Web developer (of music streaming site Last.fm). “When you have these two things in combination, it makes [NoSQL] very compelling."