Re: Not turn them in to apps.
Many Windows utilities need a refresh and some more features, as a text editor Notepad is really primitive today - I guess a lot of Windows users use Notepad++ or something alike (which could be used as an inspiration, although its programmers may not like it).
But they are apps that need to be powerful enough but not intrusive - once upon a time maybe they could be used to showcase the OS features, but today not - leave it to other applications, not basic utilities, especially if touch-enabling and UWPing them makes them less far usable. And please, no .NET and JS stuff!!!