[SuperNinKenDo]

I think Pinyin has had a bigger impact than Zhuyin simply by its use in China and in the broader Huaren communities. That said, Zhuyin is also a recent innovation, and so the point about having some kind of phonemic/phonic/phonetic system of spelling as your basis for literacy probably still stands, at least with whatever strength it has, I think the other poster might be overstating it to some degree, although it's definitely a godsend to have in Chinese now, whether it be Hanyu Pinyin, Zhuyin, or whatever.