Given Apple's renowned port-removing courage, it wasn't unreasonable to think the headphone jack would find itself getting voted off the island prior to this round of MacBook Pros.
Miraculously, the headphone jack survived... but given that it's a single modular unit (with two attached microphones) taped to the bottom of the fan, it could easily be dropped in favor of a Lightning or USB-C connector at the next
Tribal CouncilMacBook release.
Next, we take a closer look at the speaker grilles: Most of the holes are actually just dents posing as holes. The only through-holes are dedicated to the four speaker drivers and the two microphones.