I'm, I believe, 350 hours into Monster Hunter World, but I have also finished Iceborne and have 10 minicrowns and 12 big crowns already for Iceborne.
For the base game: at this point I'm only missing the (giant) gold crown for Kushala Daora, my boyfriend is missing Kushala too but also the (giant) gold crown for Kirin. Since we want to platinum it together, since we played together for so many hours, I'm helping him out with Kirin currently. After that we are going to go after Kushala, and then we do the 50 Arena quests together.
And the truth is, I'm still having so much fun with this game. After obtaining the platinum for the base game, I will go after the Iceborne Platinum too!