I agree!
I see a lot of 'Architectural Software' that only shows single-brick walls.

But why would anyone build a modern house/building with a SBW?
As much use as a chocolate fire guard.

Modern structures can have their outer & inner walls constructed from the tradition brick+brick or brick+block...

But there are many other combinations of different materials, eg: timber-cladding+brick/block or; timber-cladding+timber-frame
slate/tile-cladding+brick/block/timber-frame, etc,etc.

Also windows and doors can be attached/sit on the outer or inner walls.