Gee, @John_Brock aren’t you being a little testy with Andrew? We all know he’s been around almost as long as you have and with that knowledge I, at least, took his inquiry to be something a little deeper than you seemed to assume.
The basic viewport mode concept is an artifact of the prehistoric era before modern OpenGl and graphics cards with, as Carl Sagan might have said, “Billions of processor cores”. It is still a fundamentally sound concept, but I took Andrew’s post as floating the idea that with today’s graphics capabilities perhaps the available modes and/or the feature set of existing modes could be modernized. Shaded mode should continue to exist because there are circumstances where it’s quite useful. I think Andrew is suggesting that some of the other modes could still operate as they do today but additionally respect material transparency for those objects that have a transparent material assigned. Essentially a hybrid of “by object by material” and what they do now.
I may be reading more into Andrew’s post than he actually intended, and if so I apologize.
As you suggest ghosted is very useful, so useful in fact that I have an additional one that I use a lot named “Ghosted 50%” which is a little more transparent than the standard Ghosted and useful in a lot of situations where the standard doesn’t quite do the trick.