But there's not a huge market (and therefore, FOSS dev time spent on it) for emulating AArch64 on x86 the way there is x86 on AArch64, so if your options are to build your own AArch64 emulation for x86 (or drop a fortune into an existing FOSS option), or building something based on AArch64 and using the existing x86 emulation implementations, one of these has much more predictable costs and outcomes today.
I have seen speculation that mobile app architecture compatibility was part of it
I see. But aren't they emulating x86_64 on ARM64 there anyway? Can't they emulate ARM64 on x86_64 the same way?
Yes, in theory.
But there's not a huge market (and therefore, FOSS dev time spent on it) for emulating AArch64 on x86 the way there is x86 on AArch64, so if your options are to build your own AArch64 emulation for x86 (or drop a fortune into an existing FOSS option), or building something based on AArch64 and using the existing x86 emulation implementations, one of these has much more predictable costs and outcomes today.
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