Me in 2010: "Functional programming is great because you can write code that always gives the same output for the same input, making it super easy to test, debu

Me in 2010: "Functional programming is great because you can write code that always gives the same output for the same input, making it super easy to test, debug and share. The downside is you need to put down those for-loops and start thinking in terms of map and reduce instead." Programmers in 2020: "Yeah some of the people on the team know how to use flatMap."