I believe there's some level of real innovation in all the new trends, but I would say the majority is just recycling of old ideas implemented at a different la

I believe there's some level of real innovation in all the new trends, but I would say the majority is just recycling of old ideas implemented at a different layer (e.g. CommonLisp/Smalltalk vs. Java vs. Javascript, jails vs. docker, Thin clients vs. SPAs, ...) and hyped by some BigTech™. The industry seems to be constantly spinning tires, putting a lot of effort in rediscovering mostly the same things every decade, while really hard problems remain unaddressed. That's clear when you see most important algorithms published before the 80's.