One can only hope the developers inside Apple still enjoy using the terminal and "unix subsystem" in their work, enough to keep these things going into the future. I mean, xcode still needs to shell out to run gcc/llvm/clang, right?
I'm not sure that it does. In fact the Mountain Lion upgrade deleted the command line toolchain from my machine. I had to go into Xcode and manually tell it to re-download the "Command Line Tools" optional extension.
That's just the stuff that goes in /usr/bin, right? Aren't the files always present in /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin etc.?