Both the original Rosetta and Universal binaries worked very well 14 years ago, so leveraging the same names for this transition should instil confidence as users purchase the newer Macs using Apple’s own chips.
The naming may not be original, but it’s classic and reflects Apple’s continued commitment to providing the smoothest transition possible. With the transition to Apple Silicon, the company is naturally bringing with it another transitional layer, and it’s chosen to bring back the name Rosetta along with it, dubbing it simply “Rosetta 2.” Even the new Intel-and-ARM “universal” binaries that developers will be able to build in order to support both older Intel Macs and the new Apple Silicon Macs are simply being named “Universal 2” binaries. Apple’s solution to this was a framework called “Rosetta” that could automatically translate PowerPC apps into Intel on the fly, and while it had a few caveats, the technology performed remarkably well.
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When Apple made the transition from PowerPC chips to Intel chips 14 years ago, it had an understandable problem: How to ensure that users buying new Macs wouldn’t be faced within a collection of unusable apps that hadn’t yet been redesigned for the new architecture. So there’s no mistake that under the hood these are going to use the same ultra-powerful architecture as Apple’s iPhone and iPad devices, which should be a huge boon for developers building cross-platform apps, but it’s not going to be without its challenges and growing pains. The current “transition kit” for developers is using the same A12Z chip that’s in Apple’s current 2020 iPad Pro, built into a Mac mini running a pre-release version of macOS Big Sur. Of course, Apple didn’t use the word “ARM” to describe the new chips instead, it’s calling them “Apple Silicon” - at least until it’s ready to announce a more official designation.
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