established artists like a Adele, Britney Spears, Christina Aguilera, Katy Perry, Kelly Clarkson, Lady Gaga, Madonna, Taylor Swift
they don't necessarily rely on current charts anymore which we see in Madonna's experimenting with newer work which isn't necessarily easy chart topping material like in her early career days
Kelly Clarkson having her own talk show where she has a Kellyoke section where she covers songs of now too as well as other old songs, which she proves she can sing literally anything, also having now won 3 times as a coach on the voice
Adele we all know is quality over quantity mentality which i respect
my point is, younger newer generations need the charts more to establish themselves within the music industry