@EPonMantel thanks to Evan for turning me to this site. Great analysis and they just did one on the role of grade and the junx wax. It was something I was talking about the dilution of the PSA 10 or gem mint given the population of gem rate% skyrocketing vs vintage.
Worth reading. The one area I wish they dug more into is on the role of eye appeal and if the print run and all the sets of modern where Corbin Carroll will have literally 50+ "rookie" cards based on set or by global limit (i.e. /5, /100 etc) vs. vintage where there is only one rookie (i.e. Hank Aaron is 54 Topps and that is it). The sheer number of modern rookies dilute the power of Rookie values.
https://pancakebreakfaststats.com/2024/03/13/junk-slab-era-does-grading-even-matter/