Battery life is long enough such that MagSafe isn't as necessary as it used to be. Back when you had to haul your power cord to meetings, coffeeshops, and the like, cord tripping was a serious problem. Now? Far less so.
I bet consumer behavior has changed, and that laptops with 10+hr battery life probably get charged more like phones: overnight and in a safe location.
Granted, a lot of that is learned behavior because I know I can yank the Magsafe out without incurring a $500 repair.