One of the big unknowns of the Apple Switch that not many people are talking about right now is Rosetta, the translation software that Intel-based Macs will use to run legacy PPC binaries. Prior to the release of the first Intel-based Mac it’s difficult to assess just what kind of performance Rosetta will yield on the majority of legacy OS X software. Will most legacy PPC apps be usable? Mostly usable? Barely usable?