Anyway, 8 gigs is perfectly fine for MOST people. I’m not sure what others are doing on their AIR, which doesn’t have a fan —- so it’ll throttle if you throw too much at it anyway.
My 15 Air has the default 8 gigs, and sure, I get memory pressure from time to time (yea, the stat bar goes brown), big deal; it‘s usually due to a poorly optimized web page hogging memory. Mac OS itself is very memory efficient, and I wager for the vast majority of 15 air users out there, 8 gigs is perfectly fine, even for the next 5 years.
Because in reality you don’t have 8GB only for work, the OS use 2GB+ and also the GPU sharing the same RAM.
So suddenly 8GB RAM is not enough for basic work with 30+ tabs in Safari and/or other browsers plus few more apps running next to it. And That’s before using demanding programs like photo/video editing.