I partly agree with that sentiment. The thing is, that people that plays exlusive AoS 1.0 armies seems to be in bad shape. First AoS armies (2015-2016) were SCE, Khorne, Seraphon, Chaos (everchosen), Fyreslayers, Pestilense, Ironjawz, FEC, Sylvaneth, Bonnesplitterz and BCR.
So, from all of them, the only ones that started with an AoS exclusive roster were Fyreslayers, Ironjawz and Sylvaneth.
6 years later, Fyreslayers and Ironjawz are still the same roster with a few random Underworlds bands or a hero...