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> I go my first 64-bit mac in 2006. Fourteen years later why should the Mac have to support the older slower way that doesn’t release the potential of the hardware?

Aren't 32bit binaries (when not needing 64bits) slightly faster than 64bit versions due to the smaller pointer size?

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Depends on the use case. It's a balance between less memory and cache use (32b) and having more registers + new specialised instructions (64b). Each app will use those differently. Ideally, we'd revive x32 which is a combination of short pointers on the new architecture, but that never really got popular.

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