For most web and business programming I've done, at the end of the day I'm mostly just taking data and transforming it into other data. Most of the time, looking at these programs as a series of functions through which data gets piped to obtain the result works well. As a result I think that functional programming is a good fit a ton of code that is written using OOP. For fun, I tried converting some old side projects to F#. Once I'd gotten used to the language, I ended up being able to express the same ideas more clearly, and with fewer lines of code. Functional programming isn't magic, but it can be very effective when used in the right places.
Lately, I've been getting into game development as a hobby. And when I'm simulating a miniature world with hundreds or thousands of stateful actors, I find that OOP works really well - in that the way to code models the game world aligns well with my mental model of the game world. You absolutely can program games using a functional style - I've just found OOP to be a better fit here for my uses. It's still useful to use a functional approach where you can, though, even inside an OOP game code base. John Carmack has written and spoken about this.
You still can. You need decent data structures too, but I never in over 20 years really "got" OOP. It seemed needlessly complicated. Functions and data always seemed to do the job for me.
And the original was not aimed at dealing with the internals of a single program sitting on a single CPU, but grand simulations running on massive clusters. There each "object" would could very well be a process of its own, running on its own dedicated hardware.
Effectively OOP became another one of those buzzwords on the bingo board...
It's often an over-engineered bloat that only works for trivial Programming 101 courses (yeah the famous Employee or Bike class). But in 10+ years of programming, I found that OOP is just a complete mess (you end up with awful classes in your code like Service, Manager, AbstractFactory, and so).
I wish we could just use variables and functions, that's all we need really. :)