Sander deWaal said:

So far we've been told that the holy grail in turntable platters is either
glass or plexiglass. These are very different materials. The fact that the
parameters of a 100 year old technology can't be nailed down any better
then this is indicative of how much ******** rules the world of vinyl
playback engineering.

Hi Arnold!
Always nice to see an instructive post by a well-informed and
knowledgeable audio expert ;-)

Funny, that sound like a bit of a sermon to me.