Windows on ARM is really incomparable to MacOS on ARM, it's like comparing a 15yos Hello World to a senior engineer's 10yo project.
Yes, for simple web browsing ChromeOS is just fine, but you can do so much more with a fullblown system. The performance is also in another league.
I honestly would say that the 16GB mbAir is good value, if it fits your use case (no gaming / heavy x86-only programs).
Don't forget Apple makes a shitton of money from services (AppStore, iCloud...), which often make a lot more money than hardware (so Sammy is at a disadvantage here).
I'm not trying to convince you the Apple's awesome, I don't think that myself either (on the contrary), but their chips just are pretty awesome
Yes