For when the world border breaks immersion.
As an example, I play Origin Realms, which uses world borders quite a bit. I built my house near the world border of my private realm, and I always thought it looked ugly. I made this resource pack so I could enjoy the scenery. No world border. Nada.
Best of all, this pack is so simple, you don't have to worry about downloading the right version. It's a one-size-fits-all resource pack! Though, do keep in mind you'll get an incompatibility warning for some versions, you can ignore it.
Before:
After:
