What areas of tech involve the least churn?
I am not sure if its because I have been learning more front end stuff the last few years, but the tech industry has a horrible faddish, fashion element to it. Now that I feel that I am pretty good at SQL, NoSQL is what all the job offers want. I get better at HTML, everyone wants native apps. Learn Django and everyone says Nodejs is amazing.
I can't help thinking that most of the time the choices are no better, if not worse than what I know (obviously internally I may be trying to defend the effort I have put in). Rather than learn yet another new framework or semantics of another NoSQL database, I would prefer to build on the skills I have.
What areas of the tech are more stable, or at least don't have the faddish nature associated with them? Does lower level stuff change much?