- supermarkets are super close
- everything else is super far (including workplaces)
- you don't have a car
in mind. I don't think that in London (the main example in the article) most jobs are a 45 minute drive from central London nor that most people drive to work.
That's probably true in Boston as well. But that's because, if you work 45 minutes out of Boston--of which there are many companies along the Route 128 or 495 corridors--you probably don't live in Boston unless you're a die-hard urbanite willing to put in a long commute to your suburban job. (To be fair, a lot of the west coast companies that established Boston outposts are in town and local suburban companies increasingly have options for people to work in a city office (or remotely) if they want to.)