There is very little new under the sun, at least if you're talking about what's going on in the mainstream rather than what's happening in the theoretical space (with GADTs, dependent types, etc). It's been a very long time since I saw software development technology that wasn't just the application of something developed in the 1960's through 1980's. "Oh, Java has lambdas now? Here are the design patterns that take advantage of them. They were well-understood in 1975." "Oh, Ruby has generational garbage collection now? Here is the paper describing the performance characteristics of that--from 1984."

I think TypeScript is actually one of the more genuinely interesting developments recently--it's state of the art circa 1996 (Abadi and Cardelli's "A Theory of Objects.")

This is not really a dig at software development. There is, for example, very little in aerospace that has changed more than incrementally since the 1970's. But people have this perception of software development as this rapidly changing field where knowledge becomes obsolete in the course of a couple of years, when in reality the basic principles are really quite well-developed and mature. Keeping up with software development technology is mostly a matter of figuring out how people have gussied up old ideas with new syntax.

All of the interesting stuff now is domain specific. Algorithms for self-driving cars? Yeah, that's something that we didn't have 20 years ago.