One of the main problems of the vanilla tag system is that you can’t really create custom tags and the criteria that the game uses isn’t as effective. That’s why the Tagger mod was created – it allows you to tag stuff much better than you can do in the base game. But it does present one key problem: it becomes incredibly difficult to locate things, people, and houses. This is amazing as it makes gameplay feel much more realistic.
The Sims 3 has the biggest maps of any Sims game, because plots don’t load individually but the map stays loaded at all times when you play.