A Dev should be able to use the CLI to start a real project.
The travel demo will not be part of a real project.
The Travel demo is hard to remove from the bundle.

One solution would be to simply add download ability of bundles without demo.

Another usecase is a partner that wants to get their developers up to speed with their own demo and perhaps their own templating kit. With the downloadJars feature, and the contentImporter they could get close to this - but the installed demo gets in the way.