Yeah not feasible except for a tiny minority. I wonder if people would offer this as a service though. I presume the actual modules are cryptographically paired to the Mac so you can't just get entirely new modules.
I could totally imagine posting my module to someone else to upgrade though.
no but 265gb on a mac is like 1tb on a normal computer. there's no point in this.
being serious though, to make the parts modular but proprietary. For the price increase of 2tb of mac ssd I could put 48tb of spinning disk and 2tb of nvme for farser writes in my server.