>A lot of modern day UX designers would be aghast at the sheer quantity of data and speed at which a user can handle it IFF the UI is adequately designed.

Would they even know? There was a time when there was such a thing as domain expertise and when usability studies were an integral facet of many SDLC. Those days seem long gone now. The industry seems far more content to haphazardly adapt OTS solutions or create something that's "pretty" or "modern" at the expense of being functional.