Things have changed significantly and management purges are very common. And once you lose your job, finding a new one is hard, because to be frank you have no real skills apart from Microsoft Excel.

In many cases there have been people who lost jobs and didn't get a new job in over an year and had to move tech roles eventually. Some people had to change career tracks(get into marketing etc) permanently. So there is now a dedicated incentive to stay in the technical track.

Also in the current age, moving to a non-tech job is the long term equivalent of choosing a non-STEM career.