"They know that there are many millions of fans that will, in spite of all that MS has always done to screw them over, relentessly insist (time and time again) on having a MS virus running inside their kit."
When an alternative OS can run Adobe CS / CC, plus all the legacy specialized industry apps without overhead or adding VM management layers, get back to me.
We run Windows because we must. Get over it and get it though the gray matter. Businesses run Windows because Windows runs the apps that businesses need to get business done. From Windows-only hardware support to millions of terrabytes of data in Windows-only application files, we are stuck with Windows for the foreseeable future.