Apple is very late to the AI party. By the time M7 is shipped, Nvidia will announce 6090 and people will be buying used (3|4|5)090 GPUs to run local models at much better performance than heat throttled M7.
I would prefer a Studio if it does a decent enough job even if throttles a bit under load, way less power usage and noise than those GPUs plus the PC you need to put those in.
RAM is a commodity and nvidia will be paying the same prices. The used market will reflect the cost of RAM. nvidia owns the top of the market but many of us don't need that.
What people? Are you seriously thinking the hundreds of millions of customers Apple have is going to be buying run-to-the-ground GPUs second hand and build local workstations for AI? Might as well ask them to self host email while you’re at it.
The difference between these two is that one of them is an unsolved research problem that we’ve all spent far too much time on, and the other is just running an LLM.