The press conference isn't even part of E3. It's a pre-show event that Nintendo replaced with an equivalent one. They participated in E3 to basically the fullest extent possible right up until (according to this report) this year.Eh idk but Nintendo hasn't done a presser at E3 in so long that for the most part they had already moved on.
At any rate I think we can all agree that E3 is basically dead.