What would count a evidence?

Proof that there is an SMI related or Intel ME fault that is mitigated by Win10's kernel.

ME relies on security by obscurity (and hence the motivation of some for open source code). Of course that's not proof.

But I wouldn't rely on a Skylake ME's integrity for a public IP'd computer if it was running Windows 98 because it can be pwnd in ways that a Pentium Pro can not: replacing the disk drive won't get ownership back.

Right, I see what you mean. I just interpreted your post as possibly indicating that you knew of some specific publicized exploit.