Microsoft would like greater UWP (Universal Windows Platform) acceptance. Right now, only Windows 10 supports UWP. One operating system out of many present. Not so universal.
While it may be understandable to not go back and support older Operating Systems, such as Windows 8.1, 8, and 7, Microsoft has continued to bypass Windows 2016 (which was released after Windows 10). Developers use Windows 2016. Developers create UWP apps. There is a desire to make UWP more accepted, but it doesn’t support the latest server OS. The reasoning given is that UWP support is often updated, which is counter to server OSes. Yet there is the push to use the most secure and fastest browser, which is Edge and not Internet Explorer 11 (talk about sending contradictory messages).
Windows Server 2016 only supports Internet Explorer from Microsoft (as well as Chrome, Firefox, Opera, etc.). Yep, still scratching my head on this one. And yes, still not developing UWP apps because of it.