Technically they don’t even have an SSD anymore. They just have a bunch of NAND chips.

The drive controller is in the CPU. Which is great for performance… especially when you’re reading data that is already cached by the drive controller you’re limited by RAM speed instead of PCIe - but it’s a bit of a headache when it comes to upgrades.

The band chips are on a daughter board on their larger desktops. And soldered on laptops and the tiny Mac Mini.