Going off topic a bit but that's exactly what has happened with the former "Farang Alley" area that was excavated. Nothing but street market stalls now with umbrellas/canopies and they're selling clothes/trinkets and such. Seemed to be enough in the Night Market area but, hey, can't knock the entreprenurianship spirit here.
Hopefully, the newest extension to the night market is temporary but they probably said the same about the Sukhumvit and Patpong sidewalk vendors in Bangkok, eh?