Sounds about right. Windows is a proprietary technology under the control of a single vendor. Let me repeat that: proprietary technology under the control of a single vendor. As in any technology's future that hard depends on Windows is COMPLETELY DEPENDENT ON THE WHIMS OF A SINGLE VENDOR.
Consider that Microsoft did not write the system, nor do they have no copyright over it. Yet they have full control over any system hard-coded against Windows because they are the only company that provides Windows, and they have complete and irrevocable control over this dependency (ie. it's proprietary), and without this dependency your system becomes worthless.
Therefore, anything hardcoded to Windows is fundamentally under the control of Microsoft, not the organization that wrote it. It is forever under the control of a single proprietary vendor who may or may not have your organization's future interests, has the ability to completely change the terms of the license in order to compel you to pay increasingly more money for maintenance, or just make the system operable in the future. And you have zero recourse except to rewrite everything.
In what world is permanently tying an organizations critical or even uncritical systems to the fully proprietary technology of a single vendor a f**king rational decision? I'll tell you: no world.