https://thebhc.org/node/97369 "The Decline and Fall of the Horse"
I argue that the Industrial revolution created 'unemployment' in beasts of yoke and burden at a larger scale than humans. So, there may be something instructive in that turn of events, even if it's not a highly representative analogue of the current ones. Of course, it's like saying what's a house cat to do when there's no more mice to hunt (assuming it remains fed). Maybe knowledge workers will become qualified pets if they prove cute enough.
My border collie will be pretty depressed though, once it's out of a job (maybe replaced by a drone sheep-herd).