I would love to have the option to switch on units since I work mostly at real world scale. I UNDERSTAND that 1 unit is 1m (generally speaking) and that it is simply a matter of conversion. But I would love to be able to set the document to mm and see how many mm the radius of my fillet is right now for example. Or when setting up the grid snaps. That's something I can actually work in my head with. Having to count the zeros after the dot is simply too abstract for me. Using one unit as one mm would be theoretically an option but this would scale objects to such extend that it gets weird (since it's supposed to be 1m as I understand). So just adding the mm or cm or m after the numbers would make my life easier. I understand some people don't care about units and it could still be the standard, but I wish there was a toggle to enable units and set standard document unit.