This paper revisits the paper “Optimistic overconfidence in electronic reverse auctions” published in this journal in 2019 and discusses its contributions and possible impact. The paper established a connection between individual characteristics of decision makers (bidders in auctions), and biases such as overconfidence. One conclusion that can be drawn from its results is that online systems such as electronic auction systems should provide a flexible user interface that allows to adapt the form in which information is presented to the cognitive style of users.