This kind of mindset and mode of organising a dev team is a common, and has the advantage of interchangeable developers, not a lot of need for on the job learni

This kind of mindset and mode of organising a dev team is a common, and has the advantage of interchangeable developers, not a lot of need for on the job learning, and more long term tech stability. Basically the "we area a Java house with big teams" way. But it's far from the only one.