Why Software Quality Engineer Jobs Are Disappearing?

A decade ago, when I first started working, software quality engineer career is still a solid career path with tons of opportunities. However, around five years ago, many big companies started to eliminate software quality engineer jobs or software engineer in test jobs. They either transitioned and trained the software quality engineers into developers or laid them off. I first noticed this trend happened in Paypal five years ago. By now, a number of the major tech companies have removed the software quality engineer jobs, including Salesforce, Ebay, Intuit, etc…