IMHO, what has happened to No Man's Sky's "missing" multiplayer feature is a no-brainer. I think they originally planned to have it in, but eventually came late to the decision that it was not going to be completed in time for the release date, which couldn't be put back again. However, Sean will have been under immense pressure to never actually say "NMS will *not* have multiplayer", since sales would have been adversely affected. His hope was that no-one would manage to meet up until they had added the multiplayer feature in an update (and also try and discourage people from even trying to meet up due to the immense odds of that happening), but unfortunately, they did.
So Sean did the only thing he could: avoided directly answering any questions (since to say anything other than "multiplayer doesn't exist" would be an outright lie) and is now hoping that the multiplayer feature could be completed ASAP and added as a "multiplayer fix", since the feature was already there, just wasn't working properly. Right?