Felessan
Member
You just described 90% of game - coop, hard raids, omega raids, proto bahamut - all have saturation point at which you just "close and forget" about them for a long period of time.The entire goal of Casino is to play it to the point of where you don't have to play it ever again.
Nothing last forever, the point of most activities in game is to grab attention for some time, until you'll overgrow it and it'll become obsolete.
Hard raids becomes obsolete quite early if you have access to casino animas. Omega raid becomes obsolete the moment you get full grid in given Omega. Normal coop becomes obsolete the moment you finished it. Hard coop becomes obsolete when you grinded your mind out and earn zillions of rupees and blue crystals to last for a decade. Pandemonium becomes obsolete when you grab your replicas, creeds, fragments (here EX1-3 become obsolete), books and distinctions (here EX4 becomes obsolete).
If you look close - every activity has a clear end, that is not even that far if you concentrate on it and put some optimized strategy to achieve result.