Some areas have banned Jet skis. All Sydney
Harbour for example.
One of the most extroadinary advances in technology to me appears to be noise
reduction on jetskis. I have seen and not heard them race
past just meters away, whereas a few years ago you could hear them over the horizon.
I'm sure if a sailor had one they would know how to use them properly and go slow throu the anchorage and not use yachts as the turning markers.
However they will never be used by sailing boats for one reason: no space for groceries!
is like a station wagon
You load it up with junk everyday.