I think that editor x is quite superior to the standard editor (although it still misses some elements). I think that for some use cases however you don’t need all the responsive features, but you might still want the added features of the repeaters, and other exclusive editor x features… . In that case it would be helpful if there were suggestion lines like in the standard editor (The once that show where to place the content so most people see it on their screen).
I know that editor x is sill in beta, but once it is released, more people might make the switch if there was a simple mode, for those who don’t need all the extra features that editor x provides, but still want some of them.