It seems to me that devices (such as navigation systems) that use a stylus for touchscreen interaction have become out of of favor. Instead most new devices are intended (i. e. larger buttons etc.) to use a finger (sometimes combined with multitouch) on the touchscreen.

I'd like to know the reason why the stylus became out of favor for this interaction. Is the reason that Apple designed the iPhone to be used by finger multitouch and anybody copied this design? Or is the reason that styluses tend to get lost (but it should not be a problem to buy some auxiliary styluses if you have such a tendency)? Is using fingers instead of stylus just a temporary fashion or is there some deeper reason behind why the stylus became out of favor?