"Power Users", whatever that might really mean use MacOS because it works. They use a Mac laptop because it always and instantly wakes from sleep. Because the audio always works, and is always low latency. Because they have work to do, and the OS is extremely reliable. Also because it is light, and the battery lasts for a very long time indeed.

My laptop has been up for 43 days, not very long in a server world, but excellent for a personal device that I use for development, hardware design and audio production. The last time it restarted was probably for an OS upgrade, but I can't recall.

My work linux laptop is also pretty reliable, but this is only because I never upgrade anything on it and only use it for development. Its battery life is terrible, so I only use it plugged into the wall. My work linux desktop has issues with bluetooth audio and graphics, neither of which I can be bothered to fix.