If a flat, open-allocation model really is the best way to run a startup, you might be on to something huge here.
Actually, that's a misconception. Startups tend to need a constrained open allocation: yes, everyone can work on anything important to the company, but the latter must be defined conservatively to ensure focus. As firms get larger, the open/closed allocation decision becomes more formalized and there's a clear right vs. wrong way to make that call.
I am certainly considering, for the long term, that I'll probably be starting a company at some point. It might not happen now, it may not even happen this decade, but I probably will reach a point where that's the best next step.