Sorry, but i think you interpreted some things rather freely there. I don’t think Xpresso was ever mentioned as going to be deprecated. There were multiple scenarios on how things could develop depending on a lot of technical issues. That is one reason why scene nodes were referred to as a tech demo and not a feature. Quite a few people tended to overlook this and were then surprised when there was no quick switch over to pure nodes or something like that. Capsules are solidly based on scene nodes, there was never a moment when capsules were a thing and scene nodes weren’t, maybe in someones perception, i don’t know.
People tend to bring Xpresso into the scene nodes discussion, i think mostly because they are also nodes, but that is the only thing they have in common. The difference shouldn’t be to hard to understand for someone who knows Cinema 4D and is aware of the differences between expressions and objects.