It is literally only in the game so you can't play new content instantly, but gradually. New content is gate-locked behind power grind, so you have to grind the same old activities to be able to play the new stuff. It is a design flaw and not how this game should continue in the future. If you ask me at least. I hate it. Yet here we are, all addicted and we'll keep doing it. And Bungie won't settle on a power level cap ever. It is what keeps selling the seasons.. hell even in the seasons you don't get to play all new stuff instantly, but they release it several weeks apart, like exotic quests etc.. it sucks.