Other than seeing if a possible new hire can code a recursive routine, what's the prime use of the Fibonacci function in practical programming?

I've seen hardware implementations for a RNG in some old crypto equipment.

View attachment 314304

https://en.wikipedia.org/wiki/Lagged_Fibonacci_generator

I don't know of any really practical applications, but getting the nth term can just be implemented as a lookup table, do the work once and save the results.

 

I just asked Microsoft's Chat GPT about non integer fibonacci: