Apple products have historically faced criticism for their limited upgradeability and repairability - but most users realize these aspects after the fact - say when they need to upgrade their aging SSD - because, like most other things in life, SSDs also have a limited lifespan. Bypassing Apple's proprietary implementation, Polysoft has been developing custom reverse-engineered SSD PCBs, which you too can use, as shown by YouTuber Luke Miani in his latest video.
Last month, it was found that Apple's Mac Mini M4 had a semi-upgradable SSD, provided you knew how to solder it, blank NAND modules, and a spare Mac on hand. Traditional SSDs feature NAND modules and the memory controller on the same package. Apple hardwires its SSDs in such a fashion that it offers modular PCBs with just the NAND flash but shifts the controller to the SoC. This forces users to purchase higher-capacity PCBs/modules directly from Apple - which may technically be classified as "upgradable" - if you can pay a pretty penny.
