I suspect that, given it's just a controller, they likely won't run into the same supply issues that might hit the steam machine or frame. That and I'm anticipating it will sell stronger, for longer, than their first steam controller; so even if stock does sell out at some stage I wouldn't expect them to discontinue it for some years, any stock shortage would likely be brief.

Lastly, the staggered release cycle will probably help them manage supply issues (if they do arise) better than if they were to release all of them at the same time (the people buying a controller now, won't need to buy one bundled with a steam machine later, etc).

I really wouldn't worry about this while on a job hunt. Wait til you're financially secure and then treat yo self.