You keep saying that, but you have yet to provide any evidence. What essential drivers were reverse engineered, exactly. As far as I can tell, everything required to boot to a working graphical desktop is well documented.

I'm not giving credit to Lenovo, I'm saying that the platform is mostly open because it is based on mostly open components. In contrast to Apple's devices, where the platform is closed because it is based on undocumented components. You could say the same about pretty much any standard PC, Lenovo is just one of many vendors, I have no idea why they got singled out here.

But they do sell boxes explicitly qualified and supported to run Linux, and they do contribute to the Linux kernel development process.

The fact remains that claiming any of Apple's hardware platforms are remotely open is laughable.