I am aware of the DIP3 upgrade procedure. I read every post carefully, I think it's not time for classic sanctuaries to stop working yet, take a look at this:
The most probable outcome is we will focus on a Christmas mandatory upgrade and release all of this at once.
The biggest disruption this will require is everyone will need to be on deterministic sanctuaries by Christmas. I am working with Apollon now to find out if they will support us during the cutover (or not). If we do not have support from Apollon and Satoshi, we will recommend users who are about to be left behind use the new non-standard port feature to start a sanc. But in the mean time I will do my best to set us up with a seamless path.
So I expected a mandatory release for classic sanctuaries to be deprecated.
But the most important point of my post is that something is wrong with governance right now, which doesn't have anything to do with my sanctuaries being classic or DIP3.