I see the opposite, rehashes of old ideas rebranded as the latest new hottness. NoSQL was basically what everyone was doing before relational databases came along. Clojure is a Lisp dialect running on the JVM. ORM's are great until you need some complex query, then it helps to know SQL. Algorithmic complexities are the same whether you were squeezing things into a tiny underpowered computer or if you are dealing with terrabytes of data.

Security was abysmal probably because there were nowhere near as many threats.

Some things change. None of it goes away.