Apple's M1 iPad Pro is a beast of a tablet, but for some reason, it was discovered that Apple was capping apps at 5GB of RAM. This means that even with the iPad Pro's 16GB of RAM, apps can only take advantage of a third of it at a time, which was a bit disappointing as it could have unlocked the door to a lot more potential.

Link: iPadOS 15 Will Let Apps Access More RAM
via http://www.ubergizmo.com