In the following section of 2.3, should we say ubiquitous, versatile or omnipresent rather than prolific?

#C: find the total interest accumulated in a list of savings accounts. Again a single expression does the
entire computation. Fold is one of the most prolific combinators in FP.

Thanks,

Philip

Yes .. all of the others sound good to me. Let me see if I can change it as chapter 2 is already in pre-production. But I guess it's not too much of oddity to use the word "prolific"

Thanks.