Boston isn't as scattered as it was 20 years ago. A lot of pharma and biotech in Kendall Square as well as outposts of California companies. And there are various startups maybe especially in the Seaport. Amazon has a lot of space in the Seaport as well.

But, yes, the computer industry in Massachusetts always tended to be in Metrowest and the defense contractors were/are out in the suburbs as well.