I have quit table tennis because of the plastic ba

I seems to me that usually the poly balls do not get less spin off the rubber, but do in general result in a lot less spin by the time the receiver has to deal with it. In general they seem to have a higher friction than celluloid, but most rubbers during most types of shot grip all of them enough that the initial spin is similar. It feels to me like perhaps the bounce on the table and the air resistance contribute to this final spin difference.  While I know that people often don't like slidy table surfaces, it could be that a tiny adjustment to the table surface might rectify this poly ball spin issue.  I know that the higher hardness of all poly balls is also likely to be a factor in this, and I wonder why they are so pressurised (NP balls when they crack become quite soft so).

I have not tried the G40+ balls yet but have used XSF, Nittaku Premium, and Nittaku SHA which I find have reducing grip in that order with the SHA one not so dissimilar in grip to celluloid (though having such an inconsistent bounce).  The XSF in particular seem to be very grippy.