^^ Birkins on floors actually don't get scruffed corners because of the feet.
The next time you wear your birkin on the crook of your arm, check around the see where the birkin touches your body. You will see what I mean.
I use my Lindy everyday, and where it was a shoulder bag, and guess where's the scruffed corner? The top corner than touches my hips.
every bag i own gets corner wear. it's not just birkins it's bags in general. it's also from being put down.