Dynamic processor compatibility mode

Hi,

I was reading up on the new Dynamic processor compatibility mode in 2025 and have been doing some testing and not happy with the result. We have about 400 blades and that comes to about 8 different CPU types in those blades. As our customers have very dynamic demands we're constantly resizing clusters and the blades give me a lot of flexibility in this. 

In the past the CPU compatibility setting gave us even more flexibility to live migrate between different CPU families, but it also set back the CPU to 1970 levels feature wise.

Now with the new updated dynamic processor compatibility mode we have much more CPU functions that are exposed, which is good. The bad thing though is that the CPU level on the cluster is dynamic and my VMs could get different CPU features available with every power off - power on. 

For example when I start a new cluster with some fresh blades I just received from my supplier, the cluster will determine the common CPU level to be the latest (say XYZ). The VMs I run on it all have CPU compatibility enabled, so they see level XYZ.

Now the customer asks for some quick expansion of the cluster and I have to add some older type of blade. My personal testing has learned that the cluster now determines the common level to be somewhat lower, say RST. The VMs that are already running will keep seeing the XYZ (as expected) but:
- they can't live migrate to the older host
- on next power off and restart, they will go back to level RST.

This gives me two major issues. One is that I can't just update my clusters anymore without VM downtime since I can't move VMs to the older hosts. And the bigger issue is that VMs can sometimes have and sometimes not have a specific CPU feature set.

Would love to have an option to manually set a CPU feature set for a cluster. I would take my oldest blade, get that feature set and apply it on all clusters and when that blade type is gone, I'd just update all clusters to a new lowest level.

Also, I can't find anywhere how I can see through powershell or GUI, what the common CPU feature set for a cluster is.

Love to hear everyone's thoughts about this.....