  The Archive of Formal Proofs (AFP) is an online repository of formal proofs
for the Isabelle proof assistant. It serves as a central location for
publishing, discovering, and viewing libraries of proofs. We conducted an
online survey in November 2020 to assess the suitability of the website. In
this report, we present and discuss the results, which showed that long-term
users of the website are generally satisfied with the AFP but that there are a
number of areas, such as navigation, search and script browsing, that need
improvement.
