Because it's far more likely she'll run into some kind of problem with hardware or software incompatibility. And why does her computer make such a noise when sh

Because it's far more likely she'll run into some kind of problem with hardware or software incompatibility. And why does her computer make such a noise when she's watching Youtube and Netflix? And why did her touchpad suddenly stop behaving like it used to after a system upgrade? There are problems with Windows and Mac for casual users too, but it'd be sugarcoating things to say that Linux isn't far more likely to spuriously act up.