jwcooper parent
Your grandma doesn't need to know what wayland is to use linux. This is an enthusiast forum for people interested in this exact topic.
This post shows that she does, if she is unfortunate enough to own a device with NVIDIA graphics, because without this fix Wayland will be broken.
Of course, this is only one example of probably hundreds where an average user would have no clue how to fix their broken computer.
It doesn't. And you shouldn't install Arch on your grandma's computer.