MGS fans will point out that TPP's world is "pointless" and that GZ works just as well and some zoomer always has a meltdown because of it but its never actually been refuted

>You can start and exit missions at different places!
Ground Zeroes has this
>You can do objectives in different orders and get slight variations!
Ground Zeroes has this
>Motherbase! Mission Prep! Dynamic weather and time of day!
Technically nothing stopping Ground Zeroes from having this

Going around the open world to complete Side Ops 79: Elimate The Armored Tank Unit and placing mousecages everywhere didn't justify the open world.