> The problem is that those people who chose shiny new technology only see the benefit, while all the others in the company will rot in hell because of the stupid choice of a junior engineer (who jumped ships 3 times meanwhile). I don't see how does that benefit the company? The whole point of the article is that you should make wise technology decisions which benefits the whole organization.
Sure, if your interests are closely aligned with the company. But as you noted, the junior engineer jumped ships 3 times already, probably with significant salary increase each time, and in part due to a CV that includes the use of exciting modern tech, which shows he's eager to learn and is passionate etc. Why would he care how the old company is doing?
People often don't stay at the same place long enough to feel the long-term consequences.
People will do whatever the (job) market rewards and is fun.
It's a bit different when you wear multiple hats. Then it may be best to focus on one specialization and keep things boring for the rest. For example at a small company, as a single-person data scientist/engineer/developer you may want to focus less on the IT fads and more on the modeling, because your CV is best padded by fancy new ML models, not by fancy new database engines. Or vice versa.