The number is irrelevant, the performance yielded by the number is not, and current performance with that same number is not very good. Additionally, each iteration of iOS expands memory needed by the system. So project that out for the 2-3 years most people will have this phone and there's a potentially ugly problem. If they implement split-screen multitasking as has been rumored, or multi-user account switching, that could get even worse.
You seem to be thinking about the iPad. This is on about the iPhone, theres no split screen or account switching there and current ram works just fine on my iPhone 5S, never had an issue ever.
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so your own situation is rapresentative of (at least) 85% of iOS users? Way to go.
I am a power user and i notice it. My girlfriend is a normal user and she gets annoyed by low memory crashes and tab reloading.
My mother is really a basic user and, guess what: she is annoyed as well.
So the average user (at least 85% of the massive iOS user-ship) knows.
A lot of them just think that this is something to be expected, but it's not.
No id say my situation is representative of the 15% of iOS users. Never have had had low memory crashes on the iPhone ever. iPhone 5S, never had an issue, and I run lots of tabs, they all load perfectly fine.
The iPad could do with a boost.