[ZiiS]

You already can buy an extremely high performance workstation without ME or PSP or equivalent; they are just a bit pricy. https://www.raptorcs.com/content/TL2WK2/intro.html

[monocasa]

The Talos has the BMC (Baseboard Management Controller) that runs a full Linux distro off the side and is connected to the network.

The only reason why it might not be considered a ME or PSP replacement is that the user can control the signing keys.

https://en.wikipedia.org/wiki/OpenBMC

[qubex]

If the next Mac Pro doesn’t utterly blow me away I’ll take a dual-CPU POWER9 system into serious consideration. My only concern is drivers for suitably powerful GPUs.