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gull puts it nicely. To be fair, if Windows' GUI ran "over" a CLI, and there was a problem with it (as with the (in)famous Ubuntu bug of a few weeks ago), the system would be recoverable; however, as was pointed out in relation to Ubuntu, few, if any, members of its target market would be able to deal with putting the GUI right from the CLI. To add, it's certainly true that the data in a journalled filesystem could be "resurrected" if the filesystem crashed in the middle of writing the data - but what if it crashed in the middle of writing the *meta*data (the journal)?
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