A venn diagram will provide all possible combinations of opinions, but there are definitely people out there who suggest 'he/she' or 'zhe' instead of 'they' because the latter 'sounds funny'
Zhe has got to be the stupidest proposal I've heard of. Let's invent a word using a letter that almost never leads non-loanword English words to solve a problem that only pedants and people who are eager to find sexist oppression in the innocuous are bothered by.