I am sorry to here you device is not functioning as it should compared to previous devices. I don't think this is acceptable either, but claiming Apple should add more RAM will NOT resolve this issue. Developers are largely in charge of what their app does after being frozen in the background for certain periods of time, this is what causes the issue for some people and not for others.
As a deverloper, running 2 and sometimes 3 VMware stations at once I can assure you he/she does not use more RAM than I. Future proofing is fine, but claiming you're "disappointed with Apple" is ridiculous. If you really really require that much more RAM then you should be able to afford a desktop workstation that does the job properly.
Like I said above, the interactivity in the app and how the developer has set things up plays an important role in the refreshing of the app. This problem is NOT with the RAM, not currently at least. Also there's apps with memory leaks, there's Safari where you have to take into account that javascript isn't built to be frozen in the background and that when safari is forced to do this and whatever code was running WILL be refreshed because it's asking the device to continue running code from halfway through. It doesn't work that way and so it does the only thing it knows by refreshing the page. This especially happens often with pages that are ad-rich or have a lot of javascript loaded on to it. Explaining why bobby did not experience the problem with his device.
Edit: Sure guys if you have enough apps open, at some point your RAM will be filled up. But this can be done with any amount of RAM, right now the vast majority of people is NOT experiencing issues that has anything to do with a lack of RAM. It might seem so, but it's just iOS. From where I stand currently iPhones specifically, do NOT need more RAM. This is coming from a heavy user, I test certain apps under extremely unrealistic workloads to see how they perform. iPhone does a fine job handling these tasks.