Just like the credentialed schools, there's a wide variety in quality and outcomes, but I think it's pretty clear they're doing better on ROI (and at least people aren't going into decades of debt for them en masse).
> "If the school failed to survive, does it affect the survival of its graduates? Is this going to have a psychological effect on how industry views bootcamp grads, and consequently affect the job prospects of bootcamp grads?"
If someone learns nothing after finishing their courses and has nothing positive on their resume for several years, they'd probably be in a tough spot. That's not really very different from the case for other types of schooling, though. If someone is learning and growing though, why would it? Only an extremely strange employer would ignore a candidate's performance in their last job and reject them based on schooling they did before it.