I have not used spreadsheets very often since the mid-1990's. One of the reasons: I was excited by the potential of Improv, but disappointed when I realized that it had no future. Little did I realize that pivot tables were a different take on the concept!

(The other reason for abandoning spreadsheets was performance. I forget how good/bad Improv was in this respect, but I doubt that I would have stuck with spreadsheets since the data sets I was dealing with weren't really appropriate for them.)