Capacity isn’t the only metric for batteries. The faster you draw down the more power converts to heat. Different battery chemistry changes that a bit, but also aggressive power management to flatten (and lower) the curve matters a great deal.

Apple nailed that during the same generation they introduced the unreplaceable battery. Better density, less packaging, and improved power management virtually doubled the run time on that laptop versus the previous. That was a huge deal at the time.

Has everyone else caught up?