[cmrdporcupine]

Apple has been using ARM on and off since 1993. They have more long term organizational experience with ARM than they did with x86.

The Newton, then the iPod, then the iPhone, and now the M1.

The iPhone is a more important device for Apple than the Mac from a revenue point of view, and they've sold more devices with ARM chips in them than they have 68k, PowerPC, or x86. They've sold 2.2 billion iPhones. I can't find an easy number on how many Macintoshes they've sold totally, but I can't imagine it's close to that.

In fact, they used ARM in the Newton (1993) before they used PowerPC in the Power Mac (1994).