The massive list is a specialized type of simple grid style list.
This list style is sometimes used when the instance list is going to contain hundreds or thousands of items - noting that how long it takes to transit a list of thousands of things from your server to your client bowser is something you need to think seriously about before doing it.
The massive list is paginated. This offers some performance benefits when visualizing the list in the browser, and it often allows the end-user to more easily move around in it than by using a scroll bar.
In some application designs a massive list is initially loaded with several thousand items and then used for hours by the end-users. Typically, they rapidly find items within the list using the Quick Search feature and then work on the items individually.