Keep in mind that functional isn't better or worse than OOP. What you see on HN is merely a reaction to the trend in the past decade (a trend still going on today) to teach OOP as the only de facto paradigm to use.
If Functional Programming was mainstream, everyone here would be raving about OOP and its benefits.
Ultimately what you want is to borrow the good ideas of different paradigms to create elegant and practical code.
Keep in mind that functional isn't better or worse than OOP. What you see on HN is merely a reaction to the trend in the past decade (a trend still going on today) to teach OOP as the only de facto paradigm to use.
To put it another way, OOP is a pretty nice hammer, but so many people have been using it to bash screws in (including ridiculous cases like concrete!) that others have reacted by using screwdrivers for everything (including nails). Pick the right tool for the job.
