I have a High Sierra install with Xcode 9.4.1 (x86/x86_64) sideloaded with the Xcode 3.2.6 toolchains (PPC/PPC64) via XcodeLegacy (which I had to patch for PowerPC 64), plus a Monterey install via OCLP with Xcode 14.2 for ARM64. Also the 2011 Mac Mini that runs these builds has hardware issues :<