Slightly related, Microsoft recently stopped accepting Windows 7/8 keys for Windows 10/11 [0], a change which now is also causing issues when reactivation is triggered on existing installations due to hardware replacements [1].
[0] https://www.theverge.com/2023/10/11/23913107/microsoft-windo...
[1] https://www.theverge.com/2023/11/15/23958751/microsoft-windo...