Most companies have 3rd party software they buy which is critical to their and most of that software was designed to run on Windows. Since people are locked int

Most companies have 3rd party software they buy which is critical to their and most of that software was designed to run on Windows. Since people are locked into this software, the vendors of said software have little incentive to switch off Windows Server. Exchange Server is prime example of this if everyone hadn't switch to 365. This is the state of modern Enterprises.