Google can also be mandatory for a company your work for, or a client you provide services to. Yeah, you could opt out to work for that company/client, but that

Google can also be mandatory for a company your work for, or a client you provide services to. Yeah, you could opt out to work for that company/client, but that's no different than attending another school. There's really no difference. It's all about network effects. We're seeing Google docs, Dropbox folders replacing what Microsoft Office was in the past. Vendor lock-in by network effects. You may like it or not yourself, but let's not pretend it isn't something that it is.