That's not their point? Linux has all the drivers lying around on disk and on every boot just does hw detection and loads the appropriate ones. It takes a few seconds. You can take a Linux install from a modern AMD system, stuff it into a 10 year old Intel system and it will boot up instantly. No driver install no "getting your devices ready" screen that shows up for a minute or two.
This has nothing to do with being open source or being customizable. It's simply pointing out how fast hw detection is not only possible but the norm on other systems.