Max out the "memory"? Are there really slashdot readers that confuse RAM (memory) with flash (storage)?
In fairness, it could be that you're confusing memory and storage and the OP really does mean memory.
Maxing out the memory (yes, RAM) is actually a reasonably sound - if expensive - strategy. Several times Apple have stopped offering updates to iOS devices that don't have enough internal memory.
Right now, there are two models of the iPhone 12 that have 4GB RAM (12 and 12 mini) and two models that have 6GB RAM (12 Pro and 12 Pro Max). So if Apple ever decide to set the iOS RAM requirement at above 4GB, then two of those models will no longer be upgradable to the latest version of iOS - despite being released at exactly the same time as the others.
This is the reason why some devices get more iOS updates than others, it usually boils down to them having more internal memory.