More JS frameworks (databases, back-end frameworks, languages, caches, messaging systems, etc.) equals more specialization, "job security", higher wages, etc.

More JS frameworks (databases, back-end frameworks, languages, caches, messaging systems, etc.) equals more specialization, "job security", higher wages, etc. To illustrate, the (extreme) corollary is one stack and one pool of laborers with one skill-set. Just another vantage point, whatever we think of the tech merits.