My n=1 - At $Employer, we had a prospective vendor who insisted on payment via Zelle. Made a quick "what should we know about Zelle?" call to $Employer->Bank. After a few phone transfers, their expert told us to avoid Zelle if at all possible. Because for a legit business, that platform was very little better than traditional alternatives. Vs. for a fraudster, it was vastly superior. So if we considered P(vendor is crooked|vendor insists on Zelle), and did the math...
Oh - $Employer->Bank == 'JPMorgan Chase'.