Even then, with Windows 7 most things were consistent and if you really cared about consistency even with non-themed apps you could always switch to Windows Classic theme (which i always did, not so much because of consistency but also because i just like that theme :-P).
Since Windows 8 with the introduction of Metro/UWP/WinUI/WinWhateverNext consistency was thrown out of the Window, without even trying to pretend otherwise (it isn't a coincidence that the UI guidelines for desktop applications in Microsoft's site still use the Win7 theme).
[0] Compositing, no longer need to reboot to install new video drivers [1] Centralized per-application volume control [2] VLAN tagging and bridging without third party products
Sadly, the thing with the new settings panels and mobile-ified look & feel is true. But that was all post-7.
> It would be interesting if there were any developers working on anything but cloud at MS the past 10 years.
There are, unfortunately, and they're terrible and keep pushing broken Windows updates and new features nobody asked for.
I am not here to advocate that Windows is great, but to write something like this is just daft.
Visual consistency is not the main challenge of an OS, Windows is not MacOS in terms of visual polish and never will be.
The list of changes since those days is enormous. Just as an example - in XP any software could outright delete Windows folder or boot file and leave your computer uncountable. Modern UWP applications live in a sandboxed container with tight permissions and uninstall leaving no trace.