As I mentioned in the blog post - both Notepad and Task Manager aren't that inconsistent with the rest of the OS. Notepad is just a giant text box. Task Manager is a compact, tabbed view (tabs didn't go anywhere in the latest version of Windows) that now became Fluent-ified and in the process now looks very wasteful of vertical space.

Above all, I think the problem is in priorities - Notepad and Task Manager _should_ be consistent with the OS. But when so much focus is assigned to those instead of the core pieces of the OS, it's fair to start raising some questions.