In this case, Facebook please keep going, we need more promotion of buzzwords like for example "functional" in tech.
Seriously though, these guys are either trolling or they have absolutely no clue about how to decide what is good and bad in technology. Sounds like a grumpy old man, everything "new" must be bad.
Just for the record:
"Functional programming has its origins in lambda calculus, a formal system developed in the 1930s to investigate computability, the Entscheidungsproblem, function definition, function application, and recursion."