I do stand by this point but a lot of people have misinterpreted it, so I want to clarify. When I say genAI "doesn't work", I do not mean that these products cannot generate images, produce running code, emit what appears to be coherent language. Like, obviously, everyone can just watch it do that stuff. What I mean is that it does not appear to do any of those things to a level of quality that meaningfully improves productivity. It does not have positive ROI.
Computer-automated accounting is *vastly* faster than doing it manually. Across entire industries, the cost of hardware & software — specifically, the systems which can perform tasks like email & accounting — is trivial. So it would seem that finding research to illustrate the explosive growth in productivity along with IT expenditures should be simple, right? I have learned that this is not the case, and in fact the fact that it is not the case is a whole field of study https://en.wikipedia.org/wiki/Productivity_paradox
However, I have also learned something significant from this discussion. Subjectively, I would consider the productivity impact of other computer automation tools, particularly computer networks, to be obvious. Like, obviously, an email system can send messages faster and cheaper than any paper mail system by orders of magnitude, right?