I did a lot of analysis and biz dev work on the "Excel killer" and came to the conclusion that it would be hard to get people to pay for.

For one thing most enterprises and many individuals have an Office 365 subscription to access Office programs which are less offensive than Excel so they aren't going to save any money by dropping Excel.

On top of it the "killer" would probably not be one product aimed at one market but maybe a few different things. Some people could use "visual pandas" for instance, something that today would be LLM-infused. Other people could use a no-code builder for calculations. The kind of person who is doing muddled and confused work with Excel wouldn't know which "killer" they needed or understand why decimal math would mean they always cut checks in the right amount.