Opening up a can of worms with this vid on skill build
Monocouche is far better then s/c in every way ! The issues are build details and any render would stainLet's be honest monocouche is only really popular with the developers. It suits their purposes down to the ground. As soon as you point out the possible (probable) issues with it most private house owners don't want it.
Mono has been sold just how Artex was, as a non crack material that didn't need decorating. Once you explain to people that you can use exactly the same mesh etc. in S&C and that decent paint will last ten years plus and how vastly cheaper the materials are, they soon see the light.