I mean Niji did have some 3d debuts during this year's Holofes didnt they? and like you said, they also debuted ILUNA right after Tempus
Him talking about Holostars being the scapegoat has some legs since they opened auditions right after Noctyx debuted
https://holostars.hololivepro.com/en/news/20220304-01/
so he could be talking about StarsEN Gen 1, ILUNA, or the recent Niji3Ds