[dnanian]

Time Machine is clearly a good, albeit new, backup system. I'm not going to declare otherwise, and haven't.

Full system recovery isn't its strong suit, though, and the case it's optimized for -- individual file recovery, etc -- is, to my mind, a rare occurrence. But, when it happens, it's great to have TM there.

But, if your disk dies and you need to work from another Mac in your house, or a loaner, you can do so right from the SD! copy. You can't do that from a TM backup: it must be restored to be useful. And full recovery is fast and painless.

Disk space, these days, is cheap, with good 500GB drives going for $100 or so. There's little reason not to get the space you need to do both a SD! copy and a TM copy.