To be fair, nobody has upgradable memory in any system that has enough memory bandwidth and compute power to run LLMs with decent performance. It might be interesting to compare against some decade-old x86 server or workstation stuffed full of LRDIMMs to reach 1.5–2TB of RAM, but the bandwidth would be only slightly faster than a desktop today with high-end DDR5: nowhere close to GPU bandwidth. So performance would still suck.

Designing for extreme expandability comes with pretty steep tradeoffs.

Apple uses SoC's which means the RAM is simply not upgradable because it is a SYSTEM on a CHIP

Gates never said that, for what it's worth.

You would have the same issue with a GPU. I have 8 slots on my CPU but it cant handle 2.8TB of ram. I cant even buy 2TB for it because even though the mobo is rated for it, nobody ever made those chips (someone will sell me 8x256gb 8Rx4 for $15k but there’s no way the memory controller can handle that). 1TB is $10k and forced it to run slower.