Re: Everyday performance
>>8GB of RAM is fine now, but I'm yet to be convinced that we have hit some sort of peak where more RAM is going to be pointless down the line. In 5 years time (and many of the people who this is targeted at will want it to last AT LEAST that long) I suspect that this is going to struggle with the tasks the average consumer running the latest OSX will want to throw at it.
We hit a peak with RAM about 5 years ago... PCs shipped with 6-8Gb as standard outside the budget bracket since then and this hasn't changed; nobody ships with 16Gb except as a power machine. Windows has got leaner, MacOS was lean to begin with, and as SSDs get more widespread the bottleneck of RAM is less than it was anyway.