A lot of “rules” were written for architecture. Not always have they been followed up and also a lot of times they have been discussed by other “writers (philosophers)” / architects.
Adolf Loos was one of these architects who were more philosopher than architect. Even though the whole world listened to what he had to say, his rules were not followed by everyone and not as strict as he had hoped for. This is due to the fact that there were more of these men that had their ideas about architecture. Besides the Ornament & Crime essay there were serveral others like the “Raumplan”, “the Plan Libre” and peoples individual ideas.
Today we don’t design according to a “manual” written by one architect. There are thousands of manuals that inspire us. It’s about what we want ourselves.