Thank you so much for this wonderful, clear and articulate explanation. It has opened my eyes. I was one of those who would actually disable page file. Of course in this instance it was set to automatic. I originally did set up a separate SSD for the rolling cache but found there to be no improvement so moved it to the same one, which is a 1tb 970 Evo plus.
Anyhow. Thankfully it’s now working properly. Which is a big relief. It was a bummer having to spend 20 minutes of the one hour I usually sit for, just to load.
Thank you again. Much appreciated.