An explanation for this isn't provided in the realm of hip-hop analysis
It's provided in the art of seducing the masses
Any star power is based on an illusion. The danger is that people will grow tired of it and turn to another star. Once you're on top there's nowhere to go but down and your clock starts ticking. If your perception of being "on top" is correctly calibrated than you're perfectly aware that you've never seen anybody on top for an extended period of time. They may even disappear for awhile before reemerging in the public eye because it's easy to reintroduce the perception of success when the public doesn't see your star power wane right before them
So when you're at the top and you find yourself at the end of the album cycle, you should be looking for a departure time. Disappear. Let the public latch on to it's next star without seeing your star power deplete before their eyes. Come back 4 years later with the impression that you're too successful to drop an album every year, if you do this the public's only perception of you is that you are on top. Inevitably enduring star power will require adaptation and ultimately you will need to reinvent yourself or you run the risk of becoming obsolete. You must always renew your luster because there is nothing more laughable than an image that was fashionable 10 years ago
Jay Z never being on top at any point is his career played the benefit of allowing him to never be diminished by exhibiting a steep decline before the public eye. It's easier to longevity when you settle for maintaining consistency rather than aiming for the top spot, because there's a gamble. The material requires you to be completely out there in the sense that you aim for a hit record, which result in great success or obvious failure in an attempt to make a hit record. Example of this would be Papoose's "Bang It Out", you've got the Scott Storch beat at the height of Scott Storch's influence on the hip-hop soundscape, the major feature from Snoop and a record that sounded like it could've came from 50 Cent. Any listener with a discernible ear knows when someone is making an attempt at a hit record, every listener can tell the difference between a single and an album track.
Where's Eminem when he doesn't have a new album coming out? Where's Madonna when she doesn't have a new album coming out? They are maintaining their privacy and distance from the public eye, appearances are very rare until they wish to return to the public eye. Jay Z has learned to do the same
#WallyWisdom