That entire solution immediately falls apart when the paradigm is patented by the vendor, who immediately sues any competing software using UI elements even vaguely similar to theirs. This has been going on for decades, and the three things that usually happen are that the competitor either gets bought up, sued out of existence, or has to keep their UI different enough that there is little-to-no bleedover between the userbases (and usually starves to death from too little revenue).