I'm using Windows 10 because I want to run modern programs, but I still don't see the usability of the operating system to be as good that it was with Windows 7.
If I go to settings, or open the start menu, I have latencies measured in seconds, even though I have a fast gaming laptop.
As a comparision on my iPad most of the settings windows have about 0.2s rendering latency (some shorter, some longer), but in reality I don't see any reason why it shouldn't be the part of the continuous testing of any operating system.
Another important example is that I find it harder to find installed programs in Windows 10 than what it was in Windows 7, as Windows 7 grouped shortcuts installed by programs into folders, now I just see a big mess of shortcuts where I have to remember the name of the shortcut to be able to run it.
Windows 10 search function is completely broken, it won't even find a program that's in start menu, not sure if it's because I disabled all the online functionality of search. If I want to find something online instead of my computer I use a browser. Thankfully there are great alternatives for the atrocity, such as Everything, it's mind-blowing how a third party program is orders of magnitude faster than native system search.
One of the reasons I won't switch from macOS to Windows 10 for work is how bad search is and the lack of a proper launcher like Alfred.
It's absurd that Apple came up with Spotlight in 10.4 (15 years ago) and Microsoft still hasn't caught up with such a fundamental game changer.