This is nothing new. Wifi signals have been used to detect objects, people and animals, gait analysis[1], read keystrokes[2], monitor breathing and heart rates[3], "hear" conversations[4], etc for at least a decade now.
If you read the article, he talks about this in this fourth constraint, labor:
> The final constraint, which did hold back platform decay for quite some time, is labor. Tech workers have historically been respected and well-paid, without unions. The power of tech workers did not come from solidarity, but from scarcity, Doctorow said. The minute bosses ordered tech workers to enshittify the product they were loyally working on, perhaps missing various important social and family events to ship it on time, those workers could say no—perhaps in a much more coarse way. Tech workers could simply walk across the street ""and have a new job by the end of the day"" if the boss persisted.
> So labor held off enshittification after competition, regulation, and interoperability were all systematically undermined and did so for quite some time—until the mass tech layoffs. There have been half a million tech workers laid off since 2023, more are announced regularly, sometimes in conjunction with raises for executive salaries and bonuses. Now, workers cannot turn their bosses down because there are ten others out there just waiting to take their job.
> Plexure boasts that it can predict what day a given customer is getting paid on and use that information to raise prices on all the goods the customer shops for on that day, on the assumption that you're willing to pay more when you've got a healthy bank balance.
as Homer Simpson said in the 90s: "if you don't like your job, you don't strike! You just go in every day and do it really half-assed. That's the American way."