I knew you were correct, but I guess I didn’t equate popularity to “most graded card of all time”. I think I expected older cards to still have a lead over this card but was wrong.

There is a good chance the JP SAR Stellar Umbreon ex will beat it. In the 8 days since I last checked, another 2,253 have been graded (+1,998 PSA 10s). It is the complete opposite of a limited event release, in a High Class set that will be reprinted through the coming years
Thanks for the heads up. I’m going to add this to my tracker and will post an update if/when this dethrones Grey Felt Hat Pikachu.