I'm more curious than anything. I'd like to wait for when external HDs with TB connectivity becomes available and to see whether they're affordable (I'm thinking at least 1 TB, or as high as 2 TB). Then I started wondering, are there Mac users who choose not to use Time Machine? And if there are, just curious, why? Are there benefits to not relying on it? Do you prefer to update your stuff manually (for example, on my Windows PC, I'd update stuff by just simply dragging important folders/files into my external HD and letting it overwrite the previous ones and only did this when I felt I really had to)? Is using Time Machine that strongly advised?