Comment by nodamage

I think the author of the article really misses the point here. While "true multitasking" might be a neat technical feature, it's not something that the end user really cares about or would base a buying decision on, especially if running multiple apps in the background at the same time came at the expense of battery life. Those early versions of iOS employed a lot of tricks to squeeze performance and battery life out of underpowered devices.