The physical universe advances from state to state, but we define still can call certain behaviors illegal.
There are other cases where interacting the blockchain is illegal in a very clear manner. Example: if I know an Iranian or North Korean entity has the keys to an Ethereum wallet, and if I send USDT to that wallet as a Western citizen, that is very illegal due to sanctions.
https://www.justice.gov/usao-edny/pr/canadian-national-charg...