The guys at Extra Credits take a look at "power creep." For those that don't know, power creep is when elements introduced in a game grow in power compared to when the game was originally launched. Or something like that. Given how prevalent persistent worlds have become and how common it is for games to be patched with new areas, features and items, power creep can become a huge issue for the loyal fanbase. This Extra Credits video takes a look at power creep and solutions that would fix it—or at least keep it at bay.
Source: Extra Credits on Blip