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If you want more of a stock Android experience on Note 5 I just paid like $2 for Package Disabler Pro Android app that's even easier than the free Debloater Tool running on Windows. It has a default bloat blacklist that when disabled frees up an additional half a GB of DRAM with total free just under 2GB on Note 5. Enough for combination of 11 active and background apps without closing (NFS Most Wanted, Sky Force 2014, Sketchbook Pro, Lecture Notes, movie playback, Twitch.tv, RDP, JuiceSSH, ConnectBot, IRC and Hangouts).
Also, 'limit background processes' in developer options dictates how many non-critical apps can run in the background. The default 'standard limit' has no set # and is only limited by available DRAM. When set to 'no background process' all non-critical apps like browser, games, etc. will close while critical apps like RDP, SSH client, video player, etc. stay open pretty much indefinitely with available DRAM. So, the memory management is Android and not Touchwiz. The only influence Samsung has is the DRAM used on top of Android for its software features affecting what is left for apps and can be disabled/enabled with the above mentioned tools. For comparison Windows 8.1 consumes ~1.1GB booting to desktop while Note 5 ~1.5GB but it has more hardware, sensors, radios, etc. so higher software/driver overhead.
I'd say at this point the multitasking performance and experience on Exynos 7420 is better than Core M. In the past, you tend to run out of SoC (CPU and GPU) cycles before DRAM but with Exynos 7420 there's plenty of SoC cycles left but limited by DRAM. We're going to need 6GB DRAM sooner than later especially with the jump to next generation ARM A72 cores. Before someone mentions iOS only needs 1GB DRAM it doesn't background multitask so it's like comparing Windows 3.1 to Windows 8.1/10.
Also, 'limit background processes' in developer options dictates how many non-critical apps can run in the background. The default 'standard limit' has no set # and is only limited by available DRAM. When set to 'no background process' all non-critical apps like browser, games, etc. will close while critical apps like RDP, SSH client, video player, etc. stay open pretty much indefinitely with available DRAM. So, the memory management is Android and not Touchwiz. The only influence Samsung has is the DRAM used on top of Android for its software features affecting what is left for apps and can be disabled/enabled with the above mentioned tools. For comparison Windows 8.1 consumes ~1.1GB booting to desktop while Note 5 ~1.5GB but it has more hardware, sensors, radios, etc. so higher software/driver overhead.
I'd say at this point the multitasking performance and experience on Exynos 7420 is better than Core M. In the past, you tend to run out of SoC (CPU and GPU) cycles before DRAM but with Exynos 7420 there's plenty of SoC cycles left but limited by DRAM. We're going to need 6GB DRAM sooner than later especially with the jump to next generation ARM A72 cores. Before someone mentions iOS only needs 1GB DRAM it doesn't background multitask so it's like comparing Windows 3.1 to Windows 8.1/10.
