It's really hard to tell if an idea is bad without trying it out first. Zuck's runway was unusually long. And who knows? Maybe he should have stuck with it a while longer. We cannot say for certain that it would always have failed.

> Maybe he should have stuck with it a while longer. We cannot say for certain that it would always have failed.

Well, their execution was also very expensive and yet garbage, which is crazy with how many insanely talented people they had to work on it at one point or the other. It seems pretty clear cut as executive failure.