Add the extract faces form the subd command
of course it similarly to detach and atach in editpoly 3dmax
Thanks, this is filed as https://mcneel.myjetbrains.com/youtrack/issue/RH-53156 , I added your votes.
FYI… to use this new ability either tap the Alt key when dragging a sub-object face selection. You can also use the Copy command with the In Place option or just click to make multiple copies from one selection.