Joel dismisses Lotus Improv as an overly complex tool. And he uses its lack of market success as a measure of its intrinsic quality. Well, when you are just shipping your product and your CEO Steve Jobs gets re-hired at Apple, and the NextStep machine is scuttled, which happens to be the only machine your software will run on, that creates an interesting marketing problem. Do you wait years for Jobs to blend in his NextStep technology, creating OSX which was utter crap for several versions? The true merits or weaknesses of the Improv product never got to be experienced by any appreciable number of users. There is a very expensive spreadsheet type of product that allows you to share generic formulas, which was one of the features of Improv, so some of the key concepts do exist out there. But never judge quality by volume of sales. Faberge didn't make very many eggs, but they are still admired greatly.
And i disagree that Excel is some paragon of virtue. It is a very powerful product, but i find it very clumsy the way they have poured in so much function and hidden lots of things. Although the MS Wizard approach does work for dumb users (of which there are many), in the creative software area, MS has never had a successful product that I can think of. They have tried over and over to win desktop publishing, or painting software, and they fail because Wizards presuppose a known goal, and creative work is often exploratory. Having made very successful kids software like Flying Colors, all you need to do with a kid is show them the basics and they run with it into directions you don't expect. Minecraft is an example of a very successful creative product, arguably the most successful creative toy ever made. I am sure the author of Minecraft never imagined how far people would take that product.