A couple of reasons why Naruto [Sage of Six Paths] will still be around:

1. Still most cost effective high tier ninja. Just getting Kushina to 4 star costs more than Naruto, even more so with Kakuzu.

2. He is being less used. I still run into him in SWB and Matsuri, but in high levels, its mainly just Kakuzu.

3. A lot of times, you need to run lineups in certain modes that counter the meta. When Lightning Main pos 1 was popular, you ran gaara or shields, or masked man. WHen Konan [Angel of God] was strong, you ran kisame fusion or masked man. Naruto, most cheap counter to him is a genjutsu mirror return lineup with shields.

That's like that one post of the circle * about rinnegan sasuke and Uchiha ninjas.