>>64627557/#/ is unironically the worst general on this board by a country mile, but numbers is what defines a "golden gen". What, you think it's something as subjective as quality? All of Sanseki were absolute juggernauts in at least one field (ccv, superchat, etc) with one of them being the most SC'd Youtube channel of all time at one point. Holohero activated what the previous ID gens couldn't, the actual ID audience via Kobo, which caused a trickle down effect for the other 2. Hell, even Trinero was well on its way to being the golden gen of Holostars if only Kaoru could keep his beyblade in his pants.
The "golden gen" of HoloEN will always be Myth, even if they're not what they once were. The only way you can designate Advent as one is if you lower the standards exponentially to merely above the other gens but much worse than the branch's heights, which has never been a thing before. Golden gens had always brought in new people which caused the respective branches to soar higher than ever before.