I got desperate as they couldn't do anything about it at work (nor could I). So, on the 22nd December, I went to look for an MBA as I'm now sensitive to even the slightest fan noise. At that time, there was a shortage of stock, so I didn't have much choice.
I don't actually know if there's a 16GB option, as all I'm finding in my country is the 8GB.
Nonetheless, even for the iMac, I think a max of 32GB would have been reasonable,