The reason the game is keeping you engaged is due to the direction of the game. Given it's a new game and some of the information you've read about it has been intriguing, this will play its part as part of your enjoyment.

Everything is always fun when it's new.

This will change in time, and whether the game will remain enjoyable is entirely up to you.

There are too many factors to list as why a game is no longer enjoyable, but this sort of bends itself to the same question of "why is it enjoyable to me?" Only you can answer that.

To emphasize this a bit more, I'm currently playing No Man's Sky. Talk about a game with a polarizing launch (pun intended!), this game has "come a long way" since it released.

I wasn't there when it released, so I have nothing to compare it to, but one thing I can say is it's hitting a breaking point with me.

There is literally nothing to do in this game which isn't tied to some ridiculous grinding or "fetch, kill, photograph, or steal from it" quest and I'm baffled as to how anyone says this game is good.

I always give a game 40 hours of my time. If I don't feel satisfied after this, I'm out, but this game may not make it this far because the interactions of what I'm supposed to do aren't aligning with what I'm expecting to do.

Someone compared this to a Mario game then lamented "what's the difference?" There's a tremendous difference because the Mario game involves skill, quick knowledge of the layout to take advantage of it, and there are secrets to be found along the way. The expectation isn't just to get to the other side, it's to do it without taking damage and obtaining the best reward for trying.

DS and NMS have this infuriating "We're doing things differently, so bear with us" mechanic in which they barely hold your hand, throw you into a world, then expect to come out better for it.

It's my belief why these games come off as polarizing because they're both changing what we typically expect, but don't seem to be doing a good job of entertaining people.

On the flip side, people are so enthralled with the change, they're finding a new way to enjoy games.

Neither opinion is wrong, but only the person playing (spoilers won't change this, by the way) can determine if the game is worth their time.