Re: So- nothing compelling........
>On a serious note, do they do FLAC or some equivalent lossless codec yet?
Yes, they have done for years:
FLAC support is available on iOS through 3rd party Apps.
Apple Lossless is as the name suggests. It supports sample rates of up to 384kHz and a sample depth of 32bit. (384 kHz is so much higher than the sample of rate of CD audio that it can, like the even higher max sample rate of FLAC, be thought as far more than good enough).
What iOS devices don't do is output analogue audio from a 24bit >192kHz DAC - though they have supported external DACs at higher sample depth/rate for years. A digital out connector (such as Lightning or, on Android, USB Audio) allows you to use an external DAC of your choice - either a discrete unit or integrated into your headphones or amplifier.
Apple Lossless has been reverse engineered, so there is no issue in converting to FLAC and vice versa (and if you want, back and forth with a loss in quality - they are both lossless!)
LG were the first to include a 24bit 192kHz DAC in their phones, the LG G2, and they contributed some code to the AOSP. LG's weird semi modular G5 phone has a B&0-branded DAC and amplifier module - though this module actually works with any Android device with USB C
(The module is branded B&O, but inside are ES9028 SABRE Digital to Analog Converter (DAC) and SABRE 9602 Headphone Amplifier, both from ESS).
Quite a few external DAC / Amplifiers already exist for Lightning and USB C.
If you have high impedance headphones, then you'll find the amplifier in almost any phone, including an iPhone, unsuitable. Having an external powered amplifier - which might as well contain a DAC away from the electrical noise inside a phone anyway - fixes that. USB C or Lightning (or even USB 2.0 Audio or Apple Camera Connection Kit) allow this. It also allows headphone manufactures to adjust the digital signal to work better with the physical limitations of their drivers.... so let Sennheiser or whoever have full control of the audio pathway, rather than puick it up halfway through from Apple, Samsung, HP or whoever.