Remember the #idolanime wars. It’s obvious which one ultimately won in popularity. Yes, it’s Love Live with three installments since when that photo was taken (Sunshine, Nijigasaki, and Superstar)
Idolmaster is still alive, but of course Cinderella Girls remain the most popular and getting yet another spinoff anime this year, Million Live Anime is still in development hell, although they released a mainline game in 2021 for the PC/PS4,.
Aikatsu is still alive, but Wake Up Girls disbanded