Caporegime
Switched from Monzo to Starling today, it's used as a 'spending' account currently but I've been that impressed with Starling so far I might take the plunge and make it my main account instead of Nationwide (I'll keep that open as it's been going 20+ years)
That's what I am going to do, for card payments in places that don't take Amex. Online, abroad, small shops etc.