On Vesper and Working Efficiently
And then it gets just a little bit worse still: Mail on iOS 8 does have the ability to keep swiping to get the default action. Mail must be doing this as a custom thing or using private APIs to get this.
Which means that if we adopted the standard behavior, people would ask us why we don’t “just” do what Mail does.
Which argues for not touching this at all, since we already do a custom thing which works.
But that, again, means we’ve got this custom code to maintain and a bit of UI that’s quite unlike what users expect. (Which isn’t necessarily the worst thing. There can be good reasons for doing something different.)