It wasn't even the point of my post, but I'll bite: a digital cable means you no longer have to rely on the form factor/budget constrained DAC included in the device itself and can go for DACs of your own choice. That doesn't necessarily imply improved audio quality, but it means you have more control over your audio quality.

A digital cable can also do error handling and correction, meaning damage to the cable does not have the same impact as it does on analog cables.

Yeah, you only have one port. But that's not a restriction of digital ports but of Apple's implementation, I fully expect Android phones with two or more USB Type C ports to be released. As you can see from my post I'm not a fan of Apple's implementation at all (despite the fact that it'd be merely a nuisance for me).