Something that open-world games generally fall prey to is the concept of quantity over quality, and this isn't necessarily due to the size of these worlds but their design. An open world can be massive and still be executed well by prioritizing player discovery and storytelling over mere quantity of content. Unfortunately, the temptation to fill an expansive open world with enough content to justify its size often overcomes the design philosophy of these games, resulting in a bloated, boring experience overall, with content that could be described as "filler" at best. Fortunately, it has been confirmed that Borderlands 4 isn't fully open world, despite being "seamless," according to Gearbox.