The link you pointed to doesn’t have any empirical data and the paper it links to doesn’t seem to load. Regardless, we’re 30 years from the 90s now and if anything it seems like productivity has been accelerating since then (https://fred.stlouisfed.org/series/OPHNFB), arguably because of technology.

Also, what’s the argument for Facebook killing newspapers? Craigslist was siphoning off a main source of newspaper revenue for papers long before Facebook arrived. Would you also argue against the end result of moving on from local classifieds sections?