Windows 10 is amazing, particularly for enterprise environments. The amount of control you can have over the
OS at scale is unrivaled.
The new versions of Windows Server will likely not have a gui, actually MS wanted to release Server 2019 that way, but was pressed not to do so. With Poweshell you can manage the whole system, admins better learn PS fast to keep their jobs
I am curious to read the performance of Windows 10 is for some people bad, I have used, installed and administered every version of Windows from 3.11 and 10 is by far the best effort from M$, on almost every aspect. The only major drawback I see is that now it is overwhelmingly complex to manage if you want to have full control of it, I mean if you want to use it at home, are you going to setup Powershell language in restricted mode and enable AppLocker for having a decent security level? that is the reason I moved to MacOS 4 months ago, I did not want to work too at home, but at enterprise level is just unbeatable, with the AD integration, you have a full control of thousands of systems with a couple of clicks.
Having used Windows for more than 25 years made me very familiar with the UI, I never had an usability problem with Windows 10, I am having now with MacOS and its silly way to have command under three key stroke combinations, not putting a "Cut" in the contextual menu, and all that stuff, but it is just because I am not used to it.
Windows has to be open to a lot of HW and SW vendors, that makes its API a monster and also so much scrutiny reveals many flaws, but think this Windows 10 is really nice, with every rolling release is better, at least my opinion as long term user and IT professional, which does not make me right, of course.