First major requirement is the presence of a recent TPM module, which is absolutely not required performance-wise, but only for DRM-reasons (and read that as “Digital Restriction Management”).
Second even more arbitrary one is that they excluded all CPUs before at least Coffee Lake generation. Perhaps half of the PC stuff people I know to be running at home is still from the mid-2010s, so practically completely pre-Coffee-Lake.
And the IT infrastructure of the e.g. the German executive government branches is on average probably more in the range of 15 years old. A surprising lot of that isn’t even fully switched to Windows 10 yet… (hey, at least we are increasingly migrating away from Telefax…!)