MBP is most widely used pro audio laptop. Some people I know do simple mixing without plugging an external audio interface, just using built-in audio. It seems that Apple does not care about those people anymore.
I do pro audio. Nobody serious is using the built-in audio interface. If you're recording, you're probably using some hardware from Apogee. If your DJing, you're probably using some hardware from Native Instruments.
Why is asking a question to existing customers "Apple does not care about those people anymore"? I don't understand this sentiment as their actions show the exact opposite of your statement. Is this meant to just be a flippant comment to garner upvotes on HN? I don't get it.
It's also a reasonable quality DAC and more than good enough to do work on the move with. Your statement makes no sense, unless you measure "proness" by the girth of a connector?