Reaching level 80 gives a lot of satisfaction. In my opinion, the game does not start until this level is reached. If someone is level 80 and thinks it's game over, they are wrong. Read this article: https://www.gamespot.com/articles/path-of-exile-build-of-the-week-giveaway/1100-6421117/ and you will change your mind. The post is written very well, I think it might be helpful.