The whole post shapes the context, even the whole sentence helps already: It just "happens" to be also available to select for the end-user after product-launch. Supporting DNG would mean adding an extra feature and then hiding the RAW-option again.

--> Even if DNG-support would be adopted as a feature for the end-user, the proprietary RAW would still need to be maintained because it has a core-purpose during development of the product. The utilization AFTER that is the product-feature

None of this negates the value of RAW for photographers, this is completely beside the topic

That's not how I interpret it ¯\_(ツ)_/¯