If gopher is actually left out I won't be "upgrading" my pages to HTML5. Some of us still use these technologies even if they may not be the latest and greatest.
For very small values of 'some'.
Can you give a couple of (practical!) examples where gopher has not been replaced by http?
Chrome, explorer, opera and safari do not support gopher, and from 4.0 firefox did not support it either (though there is a plug-in).