- What's the scope of x? it appears to be the argument of two different anonymous functions.

- Is / both apply and reduce?

- So 'x f list' applies f to list x times. What if I use ',' instead of f? That is, what does 'x,/list-of-lists' do? does it flatten the list of lists and then concatenates x or does it flatten the list of lists x times? It seems confusing to have symbols that act both as operators and as functions.

- Why is '-2#x' "take last two elements of x" and not "negate the first two elements of x"? If I understand correctly, based on the evaluation order you're using it should be the latter, no?

And all of that from a simple Fibonacci function. I can't imagine how difficult it must be to dive into an actually complex codebase. And it's not just about the different paradigm. That's not the problem, the problem is focusing on terseness above all.

I get that once you are deep into a language or codebase you lose sight of the complexities because you get used to them. But it doesn't mean they aren't there.