Huawei seem pretty committed to building their own OS and uncoupling from the Western technology stack in total
https://en.wikipedia.org/wiki/HarmonyOS_NEXThttps://www.usenix.org/conference/osdi24/presentation/chen-h...
They actually reuse Linux driver stack for hardware compatibility
Most opinions of this man exists in a vacuum space isolated from the real world software industry. Building an OS from scratch is one of those examples.
It’s never seems like there’s a significant reason behind them other than………”I made dat :P”