@jwsmiths Your points are valid. But at this point it is just a recompile (simple view) for an app. If you have an app in the Mac App Store I could see Apple saying that by this date you better have binaries (leading to larger file sizes I assume) that support both 86 and Arm or your app gets pulled. If you see MS Office make it to the MAS, watch out in a few years. I would bet Apple is betting they know best.