FYI - According to his release post, Apple's playsound is incorporated into XGUI menu under "Apple's creations" tab.
There are also commands to stop/play sound local to client only, and, though I've not used it, they seem to be ULX oriented.
I believe your only new feature is a smaller menu, ie, no need to go to tabbed XGUI menus.
That in and of itself might be preferred by some.