Hope they don't, it is what makes it feel like an Amiga. MorphOS on the other hand doesn't feel or look anything like 3.9 or earlier.
MorphOS can be configured to be very OS3.x-like, and that's how I've got my system configured. The only thing I really miss is that not all of the traditional menu options are available in the pull down menus. They are in the context menus, though.
