your argument about code navigation in emacs is inaccurate, though "M-x rgrep" is used heavily. at least there are gtags. and now there is auto-complete. For C/

your argument about code navigation in emacs is inaccurate, though "M-x rgrep" is used heavily. at least there are gtags. and now there is auto-complete. For C/C++/Obj-C, clang+auto-complete stand there.