Light is great, for travelling, as long as strong enough.
But the latest Macbook (around 2 pounds) has two key problems that would prevent me buying it.
1) The keyboard feel really sucks compared to the Macbook Air. Not enough travel. And just feels shaky and iffy.
2) Having only one port (a USB C doubling as the power connector and for any peripheral) is going one step too far.
Firstly, it doesn't have the amazing magsafe connector's safety, which is a showstopper for me.
Secondly, it is not a rare use case to want plug power AND at least one peripheral (e.g. extra screen, usb memory stick, tethered smartphone.)
So this one lost Apple's famous design edge and QA excellence. Are they slipping?