The Engagement Program deep dive covers building new engagement programs (including nurture) from scratch, but I don't see anything about transitioning an existing program into a new Engagement Program. It would be nice to have a help article or video about this that answers questions like the following.
After I add my nurture programs to the Engagement program, how do I ensure that the existing nurture program members are added to the Engagement Program and the next email in the series will be sent to them at the correct time interval since their last email? Also, how do I ensure that leads don't continue to run in the old programs?
How do I add those nurture program members that are in the exhausted content list to that status in the Engagement Program?
How do I ensure that my email stats from previous nurture program sends are combined with the email stats from the new Engagement Program?
How do I ensure that previous nurture program status values are transitioned to the new Engagement Program?
If a program is added to the Engagement Program, can it have new members added to it that are not in the Engagement Program and it will still operate as before?