Yes! I forgot that the NVMe controller is on-die. I want some way to swap the NAND chips. Reminds me of this video:
For an iMac, though, they have a bigger thermal envelope and no battery. It seems more reasonable. Apple even did the software engineering necessary to support the Mac Pro.
That would be Apple’s counter-argument right there. Want Linux on your M1? Get a Mac, not an iPad. Want swappable storage? Get a Mac Pro, not an iMac.