> Do you know any big bank not using mainframes for their core operations? 90% of big banks use mainframes, so there must be some big banks that don't use them.

> Do you know any big bank not using mainframes for their core operations? 90% of big banks use mainframes, so there must be some big banks that don't use them. Interested to know who they are. Chinese? Monzo? They're getting bigger now, circa 3M customers. More than First Direct, Starling, Metro Bank.