It's likely that the last version of Windows where it all was consistent through and through was Windows 2000. Someone may correct me by bringing up an exe that ships with the currentest Windows and which looks unchanged from Windows NT 4.0.
I remember an article showing the UI of Windows system apps, and as you go deeper and deeper into %SYSTEM% or whatever, you get UI from progressively older and older versions that are sort of left behind. You get an incentive to polish all the immediately user-visible stuff, but there's so much of it anyway so if the deeper-hidden stuff that a handful of people is using is still working, nobody will touch it. Look, the WMI console was probably unchanged since Windows 2000 at the time of Windows 10.
My point exactly. Since it's the ODBC Data Source selection dialog, I think the actual users of it would be old enough to work with Win3.x/WinNT 3.x back when it was new, so maybe it counts both as penny-saving and a fan service for the greybeards?
On the other hand, how many kinds of first-party file copy dialogs and file open dialogs do you need? :-)
I remember an article showing the UI of Windows system apps, and as you go deeper and deeper into %SYSTEM% or whatever, you get UI from progressively older and older versions that are sort of left behind. You get an incentive to polish all the immediately user-visible stuff, but there's so much of it anyway so if the deeper-hidden stuff that a handful of people is using is still working, nobody will touch it. Look, the WMI console was probably unchanged since Windows 2000 at the time of Windows 10.