Maybe it don't guaranteed no more reloads, but if I buy the new iPad pro, especially the 16GB model, I'm expecting app reloads to be something that rarely happens. If like you said it still happens often its very disappointing.That's one area where reloads happen, but there are others.
16GB of RAM doesn't guarantee iPadOS won't decide to nuke an app running in the background. RAM isn't its only rationale for doing so. I often can go back to apps in the app switcher and see a reload scenario. Maps is another app that ends up in that reality a fair bit.