Absolutely! There is a very interesting point here, Richard. I have been trying to collect quantifiable evidence from other companies that personas positively influenced their business. For many, this information is, understandably, sensitive.
There is a lot to be said for an increase in empathy and customer focus as well as overall better internal communication about customers. However, it would be super interesting to explore and publish whether and how much personas increase sales from marketing campaigns, create targeted education content that is more effective, and increase interest in product that were built by teams with personas in mind.