The speaker opposite the fan also looks emaciated compared with its 2016 predecessor.

Apple's audio engineers are basically wizards, but we're skeptical that even wizards could maintain the same sound quality in a speaker this much smaller.

Only a few Torx screws secure these speakers—they're not glued down like on so many other models. Replacement almost couldn't be easier.

This modular Thunderbolt breakout board makes for a nice upgrade—last time, these were soldered to the logic board. This new configuration is more akin to the rest of the modern Pro line.

A little farther and we're treated to another modular masterpiece: the headphone jack module. It includes the headphone jack, microphone, and Touch ID connector, and can be easily replaced without dragging along an expensive logic board.