The bitcode requirement was driven by the Apple Watch launching with a 32-bit ARM core, but Apple knowing they would move to AArch64 3 years later and not wanti

The bitcode requirement was driven by the Apple Watch launching with a 32-bit ARM core, but Apple knowing they would move to AArch64 3 years later and not wanting to make devs recompile their apps (or have to support both ISAs on the Watch). The ABIs were designed to be compatible, and apps in the store were statically recompiled to AArch64 for the S4 launch last year.