I just want to add that technology is political. The directions specific entities push for become de facto standards. I have heard and seen many technical hiring staff express the idea that some technology or practice is wrong or obsolete when they are simply unaware of either the full picture or how the underlying tech works. There was a medium article that recently suggested that developer competence be measured by a number of standards that are quite obviously the result of the authors misperception about how web browsers, JavaScript, modern front end coding idioms, and modern front end build tool chains work. What was worse was the condescending disdainful tone the author had while they clearly had no idea what they were talking about.

Developers who understand the fundamentals of a particular area may not be ignorant of so-called developments in that area , but rather may be able to see where trends and modern approaches fail or lack. I know a Swiss developer who never used react in his life, but he coded up a rough approximation in an hour in front of me. He has his own tool belt, naturally. Would he be a good front end factory grunt? No. Smart companies use his services to design them tools.