I am genuinely impressed that you were gmail’s lead designer for _years_.
In the abstract, I understand how adoption and usability can turn on subtle and clever design decisions. The sum total of all these little things can definitely lead to a hockey stick uptake.
But I’m still lost on the OP “before” and “after” shots. Looks like the same info to me, just rearranged with different whitespace. Am I totally missing something fundamental?