ALL of these baseboards are under 4 square feet. The maximum size of a microlayout as defined by my good friend, the late Carl Arendt on his website Micro/Small layouts for model railroads.
I've been interested in Model Railways/Railroads for as long as I can remember and I've been designing and building microlayouts since before the term was even invented.
Whilst I have the greatest admiration for those who build basement filling empires, it's not for me. To me there is too much inspirational stuff out there to tie myself down to one layout.
So just don't show me a picture of a railway who knows where that might lead...