>>34244529No, it's a common thing for certain trends to either stabilize their growth or to significantly lose quality due to oversaturation, both ultimate end up going down as the overall interest for vtubers crumbles.
And while I could brag about NijiEN being responsible for it (and still be wrong in all honesty), the morbid reality is that everyone jumped into this trend to get a slice on their cake, and it was obvious that at one point or another, newfags jumping into this trend would find themselves with either the crumbs or an empty plate.