Nonsense. This observation is unworthy of a genius like Norvig and anyway it's not even generally true: it's all a matter of perspective, and the associated revenue model (purchase vs. subscription model). Whether the glass is half-full or empty depends entirely on perspective: whether I'm looking at this as a seller of a device (e.g. smartphone/PC/laptop/tablet) then maybe I only think of once-off purchases. But if I'm Microsoft (software suite/subscription) or Adobe or Netflix or Apple iTunes, then high penetration of my target market is great, it gives me recurring sales/subscriptions(/users on a social network, to serve ads to). If I'm an independent app developer, I love that Android has high penetration, or else that iOS has market segment of users with high propensity to spend on both app and IAP; but whatever I do, in the 2020s I don't target Microsoft Phone/ Nokia/ Blackberry/ PalmOS (RIP). Maybe HarmonyOS. (Also, high penetration and market share have a tertiary effect of squashing potential competition by siphoning revenues that might go to competitors. Anyone remember last.fm [0]? remember how Microsoft destroyed RealNetworks's business model [1] by giving away streaming-media server software for free? ("According to some accounts, in 2000 more than 85% of streaming content on the Internet was in the Real format.")
We will see the rebuttal of Norvig's Law when Netflix launches its ad-supported tiers. Or we saw it during 2020-2021/Covid, when Amazon aggressively pushed its discounted Prime to fixed-/low-income EBT/Medicaid/other government assistance recipients (at least in the US) [2,3]
With all due respect to Norvig (and if you've read his AI book or ever seen him speak in person, he's undilutedly brilliant, and also humble), he should get out there and try to sell a subscription-based device/service. Lemonade-Stand-for-web3.0, if you will... "customer acquisition" is not a dirty phrase.
[0] https://en.wikipedia.org/wiki/Last.fm
[1] https://en.wikipedia.org/wiki/RealNetworks#History
[2] https://www.amazon.com/gp/help/customer/display.html?nodeId=...