> This isn't a black-box system, it's github. Owning your artifacts is as simple as setting up a job to automatically clone the repo a couple times a day (assuming your entire company is working through the cloud interface and not a single person already has a local checkout).

Isn't the use-case they're selling in the article approximately "the development environment setup is so fragile that it doesn't work on lots of machines?" I'd be willing to wager that after a few years of the whole team using this, the fragility will be much worse, so moving away will be that much harder.