Here is a question from another 9.7” iPP user. Is 4GB of RAM enough that Safari no longer dumps pages in the background, or if you are using multiple programs, those programs don’t get closed? With 2GB this still frequently happens, and it means using the iPP as a ‘real’ computer replacement is much more difficult. I don’t even see this issue being addressed in the reviews anymore - but this seems to me like a fatal flaw in the iPad as a workhorse machine - you can’t be in the middle of a complex workflow and leave it up to chance that your programs stay open.
Yes and no, certainly not apps being closed. Though that depends on what you mean by closed. If you mean disappearing from the app switcher, that's another thing altogether. If you mean, I can see it in the app switcher so it must be running, no.
There are very, very few apps which are actually allowed to remain active for any length of time in the background with iOS. Music players, VoIP, Apples eMail you know the sort of thing.
When you switch an app from the foreground (using it) to the background on iOS, they will switch to the Suspended state within a few seconds. All well and good, you can still switch back into them and pickup where you left off. Some apps can request some extra time to finish background tasks, but will still enter the Suspended state when they finish those.
Your apps can remain in the Suspended state, really until iOS deems it necessary to free up memory. At which point the app is changed from Suspended to Not Running state. At this point all you're seeing in the app switcher is nothing more than a placeholder for the app.
So, when you switch between apps, if it is in the Suspended state, you shouldn't notice much, if any difference than when you left it. If it is in the Not Running state, the app is essentially starting up again, so things need to be refreshed/reloaded. Safari is no different.
All of which gets us to this, yes the 4GB makes a difference compared to 2GB, more apps can remain in the Suspended state, or fewer apps for longer. Any increase in RAM will always have this effect with iOS.
However, the trouble is, we have no control over what apps are Suspended and which are Not Running, iOS decides that based on how much RAM it needs to free up.
So it literally all comes down to what other apps you're using in-between switching away from an app. The more memory your Active app requires, the more chance there is of something being moved from Suspended to Not Running. So yeah, 4GB does help, but it's down to your workload to how much.