That sections states that drivers are built in to the kernel, which is not always true. There is a section below called "your hardware is not yet supported" un

That sections states that drivers are built in to the kernel, which is not always true. There is a section below called "your hardware is not yet supported" under the "cases where you should stick to Windows" section, but that misses the biggest issue which is poorly supported drivers. There are still many wireless cards, scanners, tablets, and other peripherals that have poorly written proprietary drivers or not-quite-functional open source drivers. The number is decreasing, but it's still a concern when buying new hardware.