I don't buy it. Tags can work, tags can be very helpful, but they're time and effort consuming to get right. Personally, I hate with passion systems where I can

I don't buy it. Tags can work, tags can be very helpful, but they're time and effort consuming to get right. Personally, I hate with passion systems where I can't search by multiple tags (tag1 + tag2, or tag1 - tag2). Frequently, it degenerates into a situation where a single tag is assigned to zillions of content and you have to review it all manually anyway. And if you leave tag creation completely open, you'll and up with tags "dragon", "dragons", "one dragon", "two dragons", "half a dragon","dragoon", "fire breathing lizard", used inconsistently of course. I also don't buy the idea that everyone is going to use a tagging system. Not everyone understands the benefits or cares about them. Never underestimate inertia.