But a MacBook is not a smartphone. A MacBook is a laptop, which is a portable version of a PC, which clearly has x86 as the dominant instruction set today.
I've done a fair amount of development work on both an ARM Chromebook and a Raspberry Pi, and I didn't run into any major issues.
It depends heavily on your tech stack, though. I find that developing on ARM and deploying to x86 was no big deal with Node, Python, and Go. Your mileage may vary with other languages and VMs, though.
