“Run your security patches” is easier said than done in the case of OT and it’s actually an issue that is further upstream than this. Policies, procedures, culture, and resources to execute. None of which are technical.
can't reboot, the machinists have the windows sized and positioned on screen just like they like them since 1997, so if you reboot it will cause downtime
Ouch. You just caused a major outage for <insert critical system>. Either you costed your company millions of dollars or you killed someone.
OT does not equal IT
Apparently not. IT does security patches, OT neglects them. You get what you get.