> typing is faster in zhuyin—the longest syllable takes 3 keystrokes instead of 5 [as in pinyin] The longest syllable in pinyin is 6 keystrokes: zhuang, chuang

> typing is faster in zhuyin—the longest syllable takes 3 keystrokes instead of 5 [as in pinyin] The longest syllable in pinyin is 6 keystrokes: zhuang, chuang, etc Two bad shuangpin isn't used more extensively to type Chinese as it maps easily to pinyin but only requires 2 keystrokes per character. The unused initial keystrokes map to the two-character initial pinyin sounds (i=ch, u=sh, v=zh), but the mapping from keystroke to medial/final sound is more complicated. If there was a way to change from pinyin input to shuangpin (or similar method) input incrementally so it was easier to learn, I think more people would convert.