Comment Active Directory, GPOs, enterprise features (Score 2) 966
Depending on the industry and where a business is in its growth, there is an increasing number of applications that are going the way of web-based access (which are generally not OS dependent). However, centralized administration and enterprise-level scalability with ease of administration are critically important aspects, all of in which Microsoft excels (and no one else compares. And, even when not considering these factors, some industries line of business applications only exist as Windows applications (in example, think dental software).
When it comes to these things, Microsoft wins. No one comes close to matching up. That is simply the fact. However, when it comes to deep back-end implementations (storage, databases, networking, SIEM, backup appliances, and other) Linux-based systems have significant enough advantages to win over a Windows-based system. This isn't always the case but from what I have seen this is applicable to most cases. Microsoft is trying to regain some territory in this area with the advent of Windows Server 2019 through new and some improved datacenter-centric features and functions.
If Linux wants to win the Desktop, Linux will have to win in business first. Linux already has a place in the server arena, but to win it all Linux will have to put on a marketing hat, improve its productizationability, and get vendors to support Linux (good luck with that - it isn't cost effective for all but for applications in the enterprise-class that are mission critical, and most businesses are nowhere near being 'enterprise-class'). In addition to vendors, Linux is going to have to step out of the primitive free-for-all anti-communism mentality and pick up game with lucrative, powerful, easy to administer and manage, centralized feature and functionality sets on a level high enough to give Active Directory & Gang a run for the money. This kind of thing is not going to be free (it is impossible to support these kind of feature sets for free without any form of continued active development and enterprise-level support). You're going to have to bring in these "big brother" features that all the fear mongerers in the Linux community despise.