After reading 3 pages of debates between the "2 GB" and "4 GB" camps, I have the following conclusions:
From the "4 GB" camp:
1. Many the people supporting 4 GB have not received (or not ordered) their 4 GB-MBAs. Many based their decision on previous experience of older MBAs. Others use the future-proof argument... although the resell-lost usually is greater for more expensive models.
2. The point about the relatively inexpensive option to go to 4 GB was stated over and over again. However, for many people the issue is not the money, but the BTO wait time.
From the "2 GB" camp:
1. Those that did buy the new MBA with 2 GB seemed to be happy with not having 4 GB. No one claimed that they really regretted. Either they are truly happy with 2 GB, or they didn't want to admit their mistake (who knows?).
2. It is clear that for intense applications, 2 GB is not enough, such as VMs... and we all know that the computer will slow down (not explode) when running out of ram. But the ultimate question has not been answered - how bad would it slow down, say when we use VMW fusion on a base model 11.6 MBA???? There was another thread about it. Lots of comments, but no one answered the question... although there was a report on Rev B MBA (XP on fusion) -
https://forums.macrumors.com/posts/11318693/
Conclusion:
So it remains unclear: for those that use heavy apps less than a few % of the time, how bad would it slow down with only 2 GB? Someone please post a youtube video showing fusion or parallel on the base model soon.
[EDIT] found the youtube video, here's the link:
http://www.youtube.com/watch?v=olmTB4Y8ojU