..."It is really annoying when you see 'professional architectural photographs' with vignetting. ...."

This is not considereted a mistake, just a way of another language (maybe a sort of emulation of Atget 's pictures).
I remember that the Japanese photographer used a 50 years old lens and he was not concerned on the sharpeness of his prints .Using a modern lens with a 8x10 format enlarged to a 14x20 is much sharper than it's prints , he said...