[zitterbewegung]

This is not true . The SSDs on this are not soldiered but are in distinct chips that can be removed but none of them have a discrete controller on them instead the controller is on the SoC itself. Basically they are NAND modules not full SSDs at all.

[Scaevolus]

The NAND chips are soldered with ball grid arrays, requiring a reflow oven to add a new chip, not to mention how the board itself would probably not even detect the extra chips.

Here's an M2 Air logic board with 1 of 2 NAND chips soldered on (in yellow), there's an empty spot on the board for another chip: https://guide-images.cdn.ifixit.com/igi/1A2NHYEY6dJcUcd4.hug...

[wil421]

Challenge accepted. Here’s an M1 being upgraded with both RAM and Storage by some Chinese Techs. Yes, you need an oven.

https://www.macrumors.com/2021/04/06/m1-mac-ram-and-ssd-upgr...