When an update is published it is supported, and it remains supported for the life of the minor  release, even if the update recommendations from the update graph are later dropped or made conditional.

Take a look at https://docs.google.com/document/d/1No2oG8VwCcVh3sohA1HAOXbmAKvftjkMABMmQzJJgnQ/edit#heading=h.36o801c18tpj and move some related text to docs.