I don't think Apple will go back to creating server infrastructure again. In the interim, I know Amazon created an ARM server chip called Graviton, and I'd like to run a kubernetes cluster on that
Right now I've got IDE to SATA adapters in mine, which leaves just enough space to also squeeze 2.5" sata ssd into 3.5" drive caddies.
It's been available for a year: https://aws.amazon.com/about-aws/whats-new/2020/08/amazon-ek...
In short, it's for media production, not computing. You put it in a media rack.