A stale baguette is a national tragedy in miniature. The French would probably call it a crimes contre l’humanité, or at least a crimes contre le pain. The enemy here is moisture migration: the water inside the bread has moved to the crust, turning the outside into leather and the inside into paste. The microwave is not your friend here; that’s the path to a soggy, chewy horror show.
Do not even look at your microwave. If you do, the baguette ghost of Julia Child will haunt you with a floppy whisk. We are going for a shattering crust and a pillowy, steamy interior. This requires a bit of theater, some blunt science, and zero patience for shortcuts.