your specific use-case is probably irrelevant to apple.
> I want to be able to run a large model AND other apps at the same time.
you answered yourself... go for a machine with 96 or 128gb ram.
btw for the money you'd be spending (6-7 k$) you might as well rent or buy a dedicated box with 128, 256gb or more ram and all the gpus you need.
your specific use-case is probably irrelevant to apple.
> I want to be able to run a large model AND other apps at the same time.
you answered yourself... go for a machine with 96 or 128gb ram.
btw for the money you'd be spending (6-7 k$) you might as well rent or buy a dedicated box with 128, 256gb or more ram and all the gpus you need.