Didn't you know that both MacOS and iOS are architecture-independent? Multi-CPU support is a builtin kernel feature, since the days of NeXTSTEP back in the early 90s. The development of OS X was simultaneously done on (at least) both PowerPC and Intel from the beginning. It would surprise me if they haven't been building OS X on ARM too since quite a few years ago already.I think it'll shock you how soon Apple laptops with ARM processors will arrive. When they do, Apple will have native iOS developer tools ready to go.
So, an ARM MacBook isn't an iOS MacBook. It's a MacOS MacBook, with MacOS running on ARM. It doesn't make any difference on being able to build iOS apps from iOS, which is an OS-limitation rather than a CPU limitation.
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Yes, and my G5 iMac is fully functional, has 2GB RAM, runs Tiger, and I still compile code on it for testing purposes. But what's your point? That everybody should be happy with 4GB? I'm very happy with my G5 iMac (one of the most beautiful desktops I've seen), but it doesn't change the fact that I need VR-class GPUs on Macs, and over 32GB RAM for simulation.Oh please, there are many iOS developers building iOS apps using 5 year old Macs with 4GB of RAM.