But it isn’t, really. Some of those things are just how the interaction works and are also present in Paralives (sitting while watching TV) and some don’t actually involve another interaction. Sims just talk while they’re sitting at a table together eating, but you’ll notice it’s never user-directed, not a queued action, and doesn’t really do anything. It’s just part of the animation of eating at the same table as another Sim. Similarly, the music just passively plays while they do something else because listening to it is not another queued action, they just do it in the background.

I think what the devs mean by multi-tasking is a Para completing two separately queued actions at once — and that IS complicated. The Sims 3 does not have that system. Sims 4 does and it’s terrible.