I agree with the spirit of this, that MC is an awesome file explorer and windows explorer is, well, typicial of MSFT.
My question is, why aren't you browsing with MC anyway? "Drives and Devices" is a great way to filter and search for stuff on your hard drive.
Well version 12 has come to an end , but I'll answer your question anyway...
When working with non-media files (Word, Photoshop, etc..) , and often opening & closing Windows explorer, MC takes too long to open compared to explorer. It sometimes can take up to 20 seconds to get going (working...), while explorer itself is pretty instant. While 20 seconds is no problem for when wanting to open MC to view media files specifically, just day to day browsing , opening & closing... that 10 to 20 seconds can feel like forever.
Even when MC is open, and using the "Favourites" (Navigation) to create quick links, I experience a delay, which in day to day browsing isn't instant enough, as compared to explorer.
The other thing is that I would often have a shortcut to a specific folder (eg My Documents/Work/Finals ) placed on my desktop , or just go direct to My Documents from the start menu. In this case it does not have the explorer-like left-hand tree pane , it just gives you the ability to go directly into and out of folders which are visible.
In MC it doesn't show you folders ( without obviously using the tree pane), and one also can't place a shortcut to a specific folder on one's desktop (as I often do) which would open MC in that specific location as one can do with explorer.
That's why I use explorer for "general" day to day browsing of non-media files.
And why I felt have the browse option in the windows context menu would have been a cool addition.
Hope that make it some what clearer.