ELI5 USB - is it still wrong to remove a thumb drive without first ‘ejecting’?’

Why should we ‘eject’ before physically removing a USB device? Who came up with the idea of USB in the first place? What is ‘juice jacking’ and why do we need to watch out for it?

... we explain like I'm five

Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: perkovic15, nmxt, admiralakbar1, thezhoumustgoon, dcsantonio, imlagginghelp, tstack123, intanetto, ddbaby, peppercakerinkiki and tbf16

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