This is the typical thinking of the toolmaker. It is not useful in markets. Apple is not in the business of engineering software, their in the business of consumer hardware.
A maxed out Mac Studio does very little for audio processing, and the custom audio cards that get used in the field.
Second to do the same as many users do with graphics cards configurations, one gets into gimmicks like external eGPU adaptors.
Third, Metal has not much adoption among visualisation software.
Finally, a Mac Studio can only be maxed out once during its lifetime.