I also use inbox zero, but it took me 15 years to get to that point. That's quite a learning curve, and not built into email at all--it's something you have to

I also use inbox zero, but it took me 15 years to get to that point. That's quite a learning curve, and not built into email at all--it's something you have to discover outside of Gmail or any other email client. Combine that with the fact that the most recent generation is using email less and less, and products built around email are bound to evolve in order to remain relevant.