> They could reuse the high-end Mac Studio or similar chips and only have a custom board and chassis suitable for server use, with additional IO and redundancy.
Also what would be the benefit of running Xcode cloud on Apple Silicon? Today cross compilation is the norm so the architecture doesn't matter. They would have to make a new datacenter version of their chips without the GPU and accelerators that aren't used for CPU heavy tasks.
> they literally make the Mac Pro in rackmount form for render farms and so forth.
The Mac Pro has a rack mount version is not for the server room. People use racks in audio and video production too and that's where you will probably find most of the rack mounted Mac Pros. You can probably fit 2 CPUs and 4 - 8 GPUs in the space a Mac Pro takes in your datacenter. So why would you choose a Mac Pro over that?