So, could one do the same with a CD-R?
I imagine that a decent STM could read the individual pits on
the parts that are left. Whether that is enough to reconstruct
anything meaningful is debatable. I don't have access to a handy
STM to try, but I'm told they're not hugely expensive.
But then, 10 seconds in a microwave oven is enough to
destroy that medium beyond recovery.
Ten seconds over a gas hob should see off a floppy too :-)
Antonio