I bet they’ll start investing in backup solutions right about now.
How would restoring from backups also not risk restoring whatever it was that broke their world at the same time?
It is unfortunately very rare to find this in practice - everyone seems to be happy with just snapshotting live systems as a backup these days; and it works well enough as long as there is no lingering systemic corruption of data.
(And .... Excel, by mixing data with potentially malicious code, is beyond redemption. But good luck quarantining that in a modern suit controlled company)