Stitch command in Fusion still does join/stitch patches that are not even connected into on big uber body.
This is a serious must have! Something I mentioned around 2 years go already!!!
Apps like Rhino will generate individual multi-patch objects based on how patches are sharing edges.
Currently I have to select each patch that belongs to a face carefully to only create a stitched surface that makes sense.
This slows the workflow down needlessly!