[thasmin]

The problem with tagging is that it's a laborious process and prone to errors which accumulate over time to make the system very inaccurate.

[drblast]

How is tagging any more laborious than saving in directories?

If I save to /home/user/Photos/Christmas/2009, then treat each one of those as a "tag."

If later I navigate to /home/user/2009/Christmas, I should see everything "under" that directory.

The point is that the hierarchical system filters too early. I want to see everything under a directory without having to drill down and filter from there.