Will 16GB RAM wear out the SSD? rMBP

Will 16GB RAM in my 2014 Retina Macbook Pro wear out the SSD? I plan on keeping it for 4 years.
Can the SSD, seeing how as the new Macbooks have everything soldered I think, be replaced at all if it runs out of write cycles?

The SSDs of today have a Mean Time Between Failure rate equal to that of the hard drives. That means you can use the modern SSD as much as you like as those failure rates are in many, many years. The first and second generation SSDs had vey short lifetimes. All of that has changed and you can feel free to use it as much as you like.
Your other comment, the current generation of Mac OS X's, Lion, Mountain Lion and Mavericks, do grab a great deal of the available installed memory. So it looks as though all of the memory is in use. Actually it is not but is simply grabbed by the OS X so it can quickly allocate memory as needed. More important to look at than the available memory is the Memory Pressure. Go to Applications > Utilities > Activity Monitor and click on Memory top center of the window. Then look at the Memory Pressure bottom center. As long as that is displayed as green you are great. Yellow and you are loading up the memory. Red and you are using virtual memory, the SSD, for swap space. With 16 GB ram it is not likely you will ever see that go yellow.
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Memory Module: BANK 0/DIMM0, 8 GB, DDR3, 1600 MHz, 0x02FE, 0x000000000000000000000000000000000000
Memory Module: BANK 1/DIMM0, 8 GB, DDR3, 1600 MHz, 0x02FE, 0x000000000000000000000000000000000000

Will the ssd in the macbook pro retinas ever be upgradible , ive seen that they can be removed .

will the MBP-R SSD's ever be upgradible in the future ,as we know they can be removed , so will we see replacement drives become available ?
check out the SSD (ifixit tear down ) http://www.ifixit.com/Guide/Image/meta/LpjTmUO4MTnygPTv

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Should I choose 16GB RAM or fusion HDD?

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Active: 600 MB
Inactive: 300 MB
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i'm always careful in wholeheartedly saying 'yes' when people ask if more RAM will give more performance.. while of course it will in almost every case help things along, sometimes quite dramatically, I think it's important to be realistic about what it actually does.
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I think since the days of CPU cards like protools TDM, the confusion is out there that adding RAM is like adding more DSP. so you just have to be careful that you understand what it's doing any why it can free your system up to do a little more. you can indeed see decent increases if your machine was struggling along before, given what you were trying to get it to do. or, it may just be a subtle thing.
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Will 16GB RAM wear out the SSD? rMBP

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