I looked further through the pile of papers I reviewed after my surgery, and found another related to this question. They conclude "...The frequency of BCR was 33.9% in cases with combined EPE [extraprostatic extension] and SVI [seminal vesicle invasion] versus 12.5% in cases with SVI alone..."

This is from 2020, Houston Methodist/Cornell University Medical College:
https://pubmed.ncbi.nlm.nih.gov/32956915/