I just finished designing 4 new parts. The drawings are entirely in mm and micrometers, on ISO sheet sizes. All fastener threads are ISO sizes. The dimensions are mostly in round numbers of mm. Even the date is per ISO 8601.
It's nice to know that the machinist might get a little more comfortable with metric drawings, and that the engineers in the lab who work with these parts will have the opportunity to get a little more used to using metric tools and fasteners.
