The park... me thinks you live in a bubble and don't know what the average developer day is; believe it or not, most developers don't use git or any kind of distributed source control because most developers aren't working for cool startup's in the valley or on open source projects. Most developers are banging out Java and .Net apps for corporations using some form of centralized version control and not being able to work from 4G in the park isn't a problem they ever face.
