There are particular families that cannot be purged out of Revit. I think it would be nice if the system families are separated somehow in the family tree so that the everyday user doesn’t need to sift through so much content. It would be nice to even have a toggle in the ‘user interface’ to just hide those peripheral items. I’m a mechanical detailer; I don’t need to see floors, railings, roofs, stairs, structural beam systems, etc. I would like the ability to just turn on/off the families that are automatically loaded.