I came across it when studying computer science 20 years ago, yes. Heard about it after that but never directly needed the knowledge. I'm sure it's used under

I came across it when studying computer science 20 years ago, yes. Heard about it after that but never directly needed the knowledge. I'm sure it's used under the hood in a lot of code I write and have written but so is XOR, manual memory management and a bunch of other lower level implementations that I don't need to spend time on when developing on a higher abstraction level. Not sure why you would expect all programmers to know about binary trees specifically.