Safari has always been terrible at keeping tabs open, going all the way back to iPhone OS 1.0 in June 2007. Don't expect anything to change. Expect to never leave a page where you're filling out a form or you will have to start over. It actually got a little bit worse once Apple switched to 64-bit processors and kept the same amount of RAM because 64-bit apps use 20-30% more RAM to complete the same tasks. It might run slightly faster, but it can't hold as much information. Going from an iPhone 5 to an iPhone 6 Plus, my iPhone 6 Plus reloads much more often than my iPhone 5. In iOS 8 I think it might be worse because now I get this banner across the top saying there was an error all the time. Sites like The Verge are the worst. I ran iOS 8 beta on my iPhone 5 for almost a month before release and never saw that banner, so I don't know. My iPad has a 64-bit A7 and had similar issues in iOS 7, but not as bad as in iOS 8. My wife is mainly using the iPad now that I have the Plus, so I'm not sure if it is also having as many problems. I suspect it might. Most people suggest trying another browser though, as Safari is just buggy as hell which makes the RAM problems exaggerated.