Are you sure there's not a misunderstanding here?
With today's mobile OSes... Android or iOS... you should EXPECT the memory usage to always look nearly full.
This is so that previously used apps can restart quicker, as long as no new process needs to reclaim their memory.
This modern behavior is totally opposite of what many people expect or are used to, but is perfectly normal.
exactly. Unused memory is wasted memory.
Exactly. No reason to have resources to not use them.
Missing my point guys.... and you are creating a bit of a fallacy.
There is a certain tipping point where if your OS is using so much memory by itself with NO active applications - (1.1 - 1.4gb of the 1.81 available) then it leaves very little remaining for those other applications you want to actually have open for quick accessing etc.
When a Galaxy S4 GE or Nexus 5 device can run its OS & cached background task with 650-700mb used (rather than 1.1-1.4gb), it then allows the device to have more user applications open and without as much re-loading or forced exiting (task killing) by the OS when it begins to run out of memory.
I spell it out again.. I'm not saying you need lots of empty ram - what I am saying is that the OS alone should not be using two-thirds to three-quarters of it - leaving the user very little left for other applications to run in the background. Doing so WILL inevitably lead to the OS having to task kill open applications far more often when there is request for further resources.
An example...
Take the HTC One 2013 against the S4 2013 for example. Both 2gb devices.
Yet on one hand we have sense 5/5.5 which being so much better optimised memory wise meant that having several applications open and flicking in and out of apps and even app drawer / widget screen and there is never a stutter or hiccup or trace of lag. You never felt the impact of the OS having to kill of a application because it was running out of memory.
Take the S4 Touchwiz version on the other hand, now open a few apps and then flick back and forth quickly in and out of apps and into the widget drawer and you will generally see some hiccups and micro stuttering as the device frees memory or task kills open applications to cope with whats currently happening/being requested of it...
So YES whilst true wasted memory is wasted if its never used, the fact remains having ALL YOUR MEMORY wasted by an over bloated OS results in a similar performance of a device with NOT ENOUGH MEMORY...
The Galaxy Note 3 is no better at management of it memory in regards to its over bloated operating system (touchwiz is as it always is) , BUT and importantly ... the extra 1GB ram it has over the S4 DOES INDEED lead to a very tangible and noticeable performance advantage with no traces of the micro stutters and hiccups that the S4 is often plagued with.
In this instance were not asking for ram to be wasted, what I'm saying is that it may be a case that the S5, like the S4
may not have 'enough' for consistent multitasking with user applications and a fluid (lag / stutter free) user operation experience.
For that reason I think 3GB would have been better, assuring the device NEVER has an issue with resource management.... In fact given the Note 3 did have 3gb, it surprises me that Samsung have opted to go with 2gb on the S5, especially as the S5 seems to be retailing off contract at a significantly higher premium than last years S4 off contract pricing.