There is every OS released in last 40 years running in these air-gapped OT networks. New and Old.

They killed it on enterprise too, we have not been able to activate in half a year, the phone number just stopped working…

There are offline environments that cannot do it online, this is bullshit. Working with critical infrastructure in OT networks, Microsoft is basically saying that Windows should not be used anymore in those.

Problem is that OT is full of legacy shit, so switching to Linux is more easily said than done.