Pito's Blog: Why Improv didn't succeed: "I am not sure it applies, but one could argue a parallel here with Improv. In particular this would lead you to the conclusion that the key strategy mistake was to try to market Improv to the existing spreadsheet market. Instead, if the product were marketed to a segment where the more structured model was a 'feature' not a 'bug' would have given Lotus the time to learn and improve and refine the model to a point where it would have satisfied the larger market as well."
Interesting perspectives from Improv's creator. I think Improv could have become a market-altering query/analysis tool, if its DBMS interface had been simpler and more powerful.