Take two steps forward, two steps back, and jump.
OK, this is going to be a bit petty and boring, bear with me.
In otherwords, Google replaced a two-step action with a two-step action.
Now, mind you, it’s not that obvious that everyone would think of clicking on “select all” instead of checking each mail separately then clicking on “delete’. But then again, those people would probably miss the “delete all spam” which is another link, next to the “select all”.
All this is just to remind myself of Google’s “never delete” campaign, which, in one swoop, made them hosts to half a Giga-Byte of my life. Not that I’m worried or somefing.