This is actually an old syndrome with technology. It takes a longt ime for the effect to be reliably measured. Famously, it took many years for the internet itself to show up in significant productivity gains (if the internet is actually useful why don't the numbers show that? - a common comment in the 1990s and 2000s). So it seems to me we're just the usual dynamic here. Productivity in trillion-dollar economies do not turn on a dime