Well it is still preview, but definitely much better than the classical one, from my point of view, which looks like created by kernel developers first attempt at a GUI app.
it was in fact created using state-of-the-art windows gui frameworks. in 1995. and then never updated. is it really an improvement to have a win10 settings app that is all unified... except for most of the advanced settings and half of the basic settings which are only available in the control panel?
Win 16 nor Win32 were never state of the art Windows GUI frameworks, just the basic building blocks.
That place is reserved for OWL, VCL and MFC, which WinDbg doesn't use.
my mistake. I thought MDI was new in Windows 95, but in fact it dates back to Windows 3.0, and was in fact deprecated by 95.