How much power is enough power?

This was the main thing I wanted to hit on. Because how does the equipment become "obsolete" but the monsters you fight remain the same (for the most part). So what compels the mentality that your equipment becomes obsolete when new equipment is release. Other than the instances where they ramp up monsters.

I know it sounds kind stupid but I mean like better equipment is better equipment, but that doesn't stop you from doing the same things. (granted monsters dont evolve into anything)

The need to upgrade doesn't just exist with nothing to drive it. There are huge ridiculous gaps in between them, but there is always a higher boss for one to strive to kill in this game. It doesn't even need to be the end game. People just want power to do the things they do easier than they did without it. I could have done empress before hypers if i REALLY wanted to but it was too hard to do other than as an accomplishment. I could have upgraded a lot more of course, but you ask yourself this question until nexon nudges you with a power increase for doing nothing and then that increases the drive even more.