I agree with you for ultra light trade off. I guess maybe I'm not the target market but it seems like Apple for the last 5 years or so has pushed "thinnest X ever": I'm not really sure who's been asking for it. Weight I can see, battery life to some extent (basically has to last me between chances to plug it in, doesn't need to last 12hrs because other than a couple flights a year I'm never travelling non-stop for that long) but thinness makes no sense to me. "We dropped every useful port and replaced it with this one usb 3c port so we could shave 3mm off the laptop": thanks Apple.
I really hope this doesn't become the new standard. The Macbook and similar devices I think are suited for people with decent machines on either end of their commute (or hardly use a computer (Facebook dorks) at home). You use the thing while you are commuting and then "throw it away" for a real machine when you get there vs having a good laptop and then just docking the laptop to your ethernet/external monitors/keyboard etc on either end. IMO a good laptop with oddles of ports is a better deal over all unless you are the type to not do too much with a computer at home and not care on the other end because it is your employers hardware budget.