This kind of makes sense if you look at how this should work.. Having a single port for everything is bad idea, because the electrical interface can't possibly

This kind of makes sense if you look at how this should work.. Having a single port for everything is bad idea, because the electrical interface can't possibly be the same for everything. Making this happen is obviously a really hard task from an engineering standpoint. Device makers have to employ various adapters internally, so that everything works on the same interface. No wonder manufacturers are suffering to keep up!