RAAus is limited to 2 pax, below 5,000' (unpleasant in summer) and OCTA
unless you have a PPL (or an exemption from CASA).
That may change in the future (Mick tells me it will) but until it does your RAAus pilots will have to be limited in what they can do
or upgrade to GA.
In my observation there are 2 types of PPL holders: switched-on guys who will go in and get it and then use it... and then there are the dreamers and escapists who will never apply themselves enough to pass a PPL exam.
The RAAus has allowed the dreamers and escapists to fly. The Go-getters will still get a PPL because that's the kind of guys (and girls) they are.