[namelosw]

Exactly.

Taking microservices as an example, once people are using it, they have to reinvent all kinds of ideas in a distributed way - distributed service registration, distributed stack trace, distributed process managing, stream processing etc. But really, there are almost no new ideas, even if there are, there must be someone already tried that a lot of times in Erlang.

The fact is very few people really tries to learn programming. This makes people who really learn experiencing the same frustration you've mentioned. If everyone tries hard to learn all programming concepts they've found, we've all been using fully dependent type languages with magical IDEs 100x powerful than Intellij right now.

In fact, most people are just driven by the market, and just learn randomly. Even a lot of senior Java programmers who mention SOLID occasionally don't really understand covariance and contravariance, thinking and struggling inside the box of their language everyday.