How many people who have commented so far actually own a rMB? Is this a major issue? Are you constantly worried your device is going to go flying off your desk/lap or is it actually happening? Anc are you typically charging the device while using it?
if you asked this before they had the macsafe techonolgy - i might have agreed, but dude, once you see someone at school trip over your wire, and your (macbook /MBA / MBP ) just stay on the table - I have seen this happen about 10 times to my own macs -
Its like if they removed zippers from all jackets and you asked.. well how often do you REALLY need to close your jacket...and if you need just use a pice of string (really i dont mean to flame or offend you... but for me magsafe was/is a HUGE deal)