The average capaciousness of a person's vocabulary has diminished in recent years, where people today pompously decry all but "marketing speak" as senesless and pretentious.
I do the same. In my case, an extended vocabulary would be counterproductive in business, as I work with people in a number of different countries. The dialects of English differ significantly across the globe. Also, people in some cultures will say they 100% understand items, even when they do not, so it is incumbent upon me in those cases to communicate as effectively as I am able.
