I think you're misinterpreting what his comment meant. I read it as meaning that e-commerce has been optimised repeatedly over the 30 years, from a basic start (which as you pointed out was haphazard) to the point where it is now optimised to extract every possible cent from the user, whether by encouraging them to buy with one click (the Amazon one-click patent must be around 20 years old now), time-limited promo spot pricing, sending you e-mails about what you had in the basket if you don't complete a sale, etc...

Right now, by comparison, it sounds like AI based shopping is still in the very early stages. Maybe further along than the early e-commerce, but still with a long way to go in its evolution. That'll probably happen quicker than with e-commerce, because a lot of the knowledge about what does or doesn't work has already been learned, but it sounds like it's still a long way behind. Caveat - I've never used it myself, so I don't know how far it is along that path, I'm just basing that from the article.

And quickly after that, we were meassuring traffic data with simple "how-many-requests-were-done" (including images) :-D