For those of you who are interested in talks I've given, with VisiCalc history as well as my philosophies about technology evolution, I think the fullest online is from the Business of Software conference in 2010. My talk is: https://businessofsoftware.wistia.com/medias/2zbuz8a6da?embedType=async&videoFoam=true&videoWidth=640 (Transcript, etc.: https://businessofsoftware.org/2011/08/dan-bricklin-at-business-of-software-2010-there-is-always-new-technology-when-should-we-care-how-do-we-take-advantage-of-it-video-transcript/)