Locking layers or folders

@Jayemery
I am trying to understand the NEED to Lock the Bodies, i.e., what will it specifically achieve to enable the Design of Kitchen Cabinets to be installed. Regardless of where that may be, a Mobile/Static/Camper Van, a House Kitchen or [in one case I’m my Kitchen Design life] the Tower of London.
Three Cabinets placed in the same Files.app Folder will stay in position without locking them.
To view the Sketch of your Design simply Move it from under the Cabinets into a space where it will be visible.

In:

https://discourse.shapr3d.com/t/grouping-sketches-and-moving-to-new-folders/8927

I attempted to show that by placing individual Objects in individual Files using Files.app
They can easily be Imported into any Design.

Starting with this simplistic representation, the DarkBlue Cabinet is elevated to show it’s origin Sketch, a row of Cabinets was created. Originally there were 6 Cabinets and then two were joined as one using Union:

This was Duplicated 5 times and all but one Cabinet was left in each file.
These 5 Files, shown here in Design Thumbnails were saved in Files.app:

This shows the easy way of ‘building’ the finished Design:

Unfortunately the Pencil does not show while using Files.app