[lich_king]

Mobile OSes don't allow random people to run code on your device. They allow you to install software you want and sort-of trust, which is conceptually close to the desktop model. There are some safeguards on top of that, but the primary line of defense is that cheap-pillz.virus-basket.ru can't actually execute anything on your device.

[pjmlp]

Desktop model at least on Apple, Google and Microsoft platforms is slowly adopting similar security models, boiling water and frogs kind of approach.