[vbuterin]

The closest thing to those concepts in crypto would be multisig wallets, including more advanced ones that enforce a "daylimit" where a single key can withdraw a small amount but larger amounts require confirmations from multiple keys or a delay during which another key can cancel the transfer.

See also this piece by me on social recovery (a related but not quite the same concept): https://vitalik.ca/general/2021/01/11/recovery.html

But this is all not quite the same as reversal and makes different tradeoffs.