- Intel seventh (7th)-generation processors (Kaby Lake)
- AMD “Bristol Ridge” (Zen/Ryzen)
- Qualcomm “8996"
It's impossible to find any justification for for this decision for the x86 architectures listed above because you can perfectly run MS-DOS on them. Perhaps, Microsoft has decided that the process of foisting Windows 10 isn't running at full steam, so the company created this purely artificial limitation. I expect it to be cancelled soon after a wide backlash from corporate customers.