I think that a lot of the thinking behind putting the action to the right is to have Cancel be sort of the default option (the keyboard'd still default to the a

I think that a lot of the thinking behind putting the action to the right is to have Cancel be sort of the default option (the keyboard'd still default to the action) as a way of avoiding user automatically doing actions they regret (and with the presumption that cancelling won't make them lose any work). Of course, once they get used to that, it still becomes automatic