Hush hush! By now that’s pretty much an open secret covered by various NDAs :)
What even the NDAs won’t tell you though is how much time ADO has before it’s fully “dead”. If Microsoft’s track-record is anything to go by, I would assume ADO customers will be “encouraged” to migrate 3-5 years from now, with at least another 5 before they start closing down, if not more.
Will be interesting to see how it plays out when the time comes.