AI doesn't seem to be a single problem but a label for a broad field.

I don't really want to debate definitions. But that is exactly why I want the sorter to break down 'big problems' like AI into 'little problems' like neural networks, search, etc.

How do you know that business thought it was very important?

Because people keep spending money on marginal user interface improvements that have added up to big differences in user interfaces. The easier the interface is to use, the more people will be able to use it, the more people will buy it.

[Here is a guide to graphic interfaces over time]. (http://toastytech.com/guis/guitimeline.html) Start about 30 years ago when the Macintosh comes out.