The corollary is that you have to worry about the DAC in the phone if you have an analog jack, and they're not good. So with digital only, you have the option of buying a good off board DAC (if you care), or otherwise selecting digital headphones at a price point you like.
All that said, I'm struggling to see the good side of Apple's decision to remove the 3.5mm jack. It'll make the phone worse in daily use for me - I won't be able to sit at my desk all day and charge my phone while listening to my existing, good headphones.
