Naoki Yoshida's Comment in Regard to Jump Potions/Boost Potions

[Austherus]

So, your friends only say "want" to play the game with you, but they don't really want to play the game at all.

After all, there's the whole game in the way of playing the game. Either they want to play it, or they do not. It is not sectional (here's the story game, here's endgame) - its all one game.

His friend wants to play the game "with him", not a solo experience for weeks/months, which is what old story content is.