New technology is very obviously making us more productive in several different ways - the metric in the article is just wrong. I'm going to pick on something that people in the thread haven't mentioned that much: Logistics and online infrastructure.
I get every kind of thing possible delivered right to my door and this is made possible by improvements in logistics. Not having to spend my time going out shopping for these things gives me time which I can spend productively or on recreation at my option.
1) Medicine: When in the 80s or 90s if I needed medicine I would need to wait for a doctor's appointment, get a prescription, wait at the pharmacy to collect, now my doctor knows when I need a repeat, sends it electronically to my pharmacy and it's ready when I arrive (or I could have it delivered).
2) Groceries and household goods: Everyone from Amazon down to my local deli and bakery has a website where I can request goods, pay online and have them delivered within days or sometimes even same day. This wasn't possible in the 80s at the scale we have today. You had to shop in person or some companies used to have paper catalogues where you had to send in a form to order, wait days or weeks for goods to arrive. Not only that but repeat/subscription orders were extremely limited. Now I have repeat orders for everything from my dog's food to my razor blades. THings which were subscription services in the 80s are still available but have a much wider selection.
3) Services: Lots of "in person" services can now be delivered by video. My wife and lots of friends are professional musicians. In spite of the pandemic they were able to continue teaching over zoom. Their productivity would literally have been zero during the lockdowns as they would not have been able to work at all were it not for new technology. Likewise things like video consultations allow people access to doctors etc without the time that would otherwise be wasted on travel etc to get to the appointment.