It is in some stage of discussion. We talked about it for a couple years and the time vaults are going to make it into a hard fork, just a question of which one. It might be the next one it might be one after that.
I would like to see some type of time vault system, even if limited go into the base layer as soon as possible. From there, people can work on some layer 2 apps that can test the rest of the system being discussed. If things work out, that could be then added in future hard forks if the decision is to put it on chain.