[arthurofbabylon]

I think your model of open/closed is incomplete and thus misleading. There are more states to a process than "active" and "inactive," and it is not optimal for the system to simply move processes between those two gross states. The obvious example is non-foreground apps during multitasking. A less obvious example is an app during a background refresh.

"Fully closing" a process is not necessarily cleaner than letting the system allocate intelligently, despite what one's puritanical upbringing might make them believe. (Consider how artists often need a messy space to optimally hold their processes.)

[gonzalohm]

I think my point is that minimizing the process doesn't free the ram it's using. Closing it, even if it stays running in the background, should free up resources

[Tarq0n]

That's what swap is for.