First of all: every modern version of languages you mentioned has some basic FP primitives; second: most of the time, it's all about the logic (algorithm) and d

First of all: every modern version of languages you mentioned has some basic FP primitives; second: most of the time, it's all about the logic (algorithm) and data transformations. Yes, sometimes, it feels weird, like trying to glue every single hair back onto your chin after you shaved your beard off. And of course, the approach has certain limitations - you can't use macros, you have to be careful with recursion and lazy evaluations, etc. And it only works for small problems, and I'm not talking about maintaining big projects that way.