It doesn't have to weigh a lot. The max battery you can get for regulatory reasons is 99 watt hours and that's slightly more than a pound.

A lot :/

Which is fine if you’re mostly stationary but for someone who travels a lightweight and performant laptop with all-day battery is a game changer. Only Apple has that at the moment.

Well no that particular laptop have been my mainstay for 7 years of mobility, and ran 7 years vertically on a stand, so Apple would have broken way before that Lenovo. Notwistanding the price.