If you're writing really sensitive things then callbacks are great, but I strongly disagree that this should be considered "good enough" for app-level code, but with the current state of node as a community it seems like would be very very awkward to even introduce something else right now. node-fibers is definitely annoying since you have to compile but even if you didn't you'd still be wrapping all of your favorite existing libraries to have a nice interface. As for back-pressure etc there's no reason why that doesn't work well if not better and implicitly with sync-style, many languages do this already and do it really well. I love node but the core community needs to stop being ignorant towards other concepts thinking that callbacks are simply "the way to go" when they're simply codesmell for many if not most applications.

Stuff like "hey @nodejs people lets make a website called http://fibersarestupid.com in which we provide education on how to use callbacks and streams" certainly doesn't help, it just makes node as a community look childish, maybe the site should be called iDontUnderstandFibersThereforeIDismissThem.com... come on.