Thanks for the response. I agree that the project's big boss has an impressive ability to BS on the greatness of our project, and it may be enough to push the project past the finish line.
It seems you put a lot of weight on the project's "triumph." If the project fizzles out or fails spectacularly, does that not make you more of "the fool who couldn't do it and didn't know when to quit?" I don't think I'd hold it against my coworkers for leaving if they think it would improve their situation. (And doesn't a sound project plan account for the fact that you may lose people every so often?)
Interesting note about small job market though. I only have a ~20 person IT department without much churn so it feels quite small to me still. How do you see this reputation spreading? Just the diaspora of former coworkers is wide enough that most/many companies tend to have someone who knows / has heard of you?
Full stack is a broad term. As an intern, I changed some font colors and also wrote a couple of backend scripts. That counts as full stack in my book.