When you delve deeper, you'd also find it pretty easy to comprehend that shared hosting is preferred by those who can't afford to pay for a dedicated server or VPS, and hence Linux shared hosting solutions are the most popular ones in the market.
When you combine these two facts, you'd also find it reasonable to conclude that SMEs and large corporate clients who're more concerned about security, performance, and obligatorily need support to Windows, essentially choose Windows VPS solutions, while the number of customers who look out for Linux VPS solution, is relatively lesser.
However, Linux VPS solutions, by no means, are inferior to their counterpart, and are also considered by many, but we're basically talking about relative popularity, and Windows most certainly scores over Linux, when things boil down to VPS hosting.
Have you been providing Linux VPS packages and overlooking Windows VPS? Well, it's time to think twice, and see if you can also start offering Windows VPS along with Linux hosting packages too!