An Errant Key?

According to Sarah Lyall, writing for the NYT (January 7, 2021), as Gabriel Byrne "was putting the final touches on his memoir, . . . he struck an errant key on his laptop":

Poof! The screen went blank. 

Byrne was devastated. Nobody knew how to retrieve the document. Nobody. Apparently.

But really nobody?

Hey, I'm computer illiterate, but even I know that I need only press "Control Z" on my keyboard to get everything back.

Could Byrne's problem still be a problem these days?

Perhaps he really did strike an errant key.