Can I also say that none of their data can account for early medieval Ireland and Britain? Also, again, why has no one accounted for Ethiopia and Syria and the rest of the Middle East? Like, Early Christianity started there. Ffs.
Clearly they thought Prof McKitterick’s stuff was the be-all-and-end-all. Full respect to her, she’s wonderful. But that data is not inclusive of all monastic orders over all periods. What about places far from monasteries? How exactly does proximity mean adherence?