This paper compares website usability--specifically library users' understanding of library terms--for fifty-one original research studies between 2012-2021, with the findings of John Kupersmith's 2011 white paper "Library Terms That Users Understand." Studies reported approximately twice as many terms that users didn't understand than terms users did understand, with some terms appearing in both categories. Analysis of the findings suggests a majority of Kupersmith's guidelines remain applicable to today's online environment, with some adjustments related to technology advances. We propose an additional guideline that acknowledges the role non-library websites play in guiding how users interact with library terminology.