Z640 about to order, any dates for shipping with Windows 10 ?

Question

As I heard rumours that Win 10 may be shipping circa 24th -26th July , i thought I might delay the order so it arrives ( built to order) with Windows 10
A) anyvody know when the new OS will start shipping?
B) would experienced users sugggest asking for a down grade to Win7 Pro - or is Windows 10 have a good pre launch rep ( unlike Windows 8 did ).
When formulating your advice please note Imam crap with computers and the only thing I want to do is add more discs later . No interest in RAID etc. - just want it simple.
I was going to order with 2 x 16 GB - appreciating that 4 x 8 would be better, but dont want to have to discard RAM later if 32 GB is not enough.
Will 32 GB be enough - interested in any users real world experience please.....

Answer 1

I knew you had the knowledge to move the data; but I've seen a lot of folks get into trouble doing it.
And most have an inflated idea of how much data their systems write.
What kind of write load do you actually have?
Virtually all drives provide SMART monitoring of how much data has been written, as well as projected lifespan, and information on expected program/erase cycles is available online. 
The Samsung 850 Pro, for example, should last 6,000 program/erase cycles.  Being conservative and assuming a really bad 3:1 write amplification (which is an overestimate), imagine being able to write the entire SSD and erase it 2,000 times.
For a single 512 GB SSD, that would be 1 terabyte of write load per day for almost 3 years.  Remember, you can read it as many times as you like; NAND only wears on erase cycles, which happen during re-writes.
Most people do not write anywhere near 1 terabyte of data per day.  I use my system heavily and in my case (including it being an SVN server) and I don't even reach 20% of that.  I'm spreading the write load across 4 drives with the RAID
array so the load on any one device is divided further. 
But you don't have to guess at what you're writing - what does your SMART data say?
See this article for some real-world tests/results re: endurance...
http://techreport.com/review/26523/the-ssd-endurance-experiment-casualties-on-the-way-to-a-petabyte
With larger SSDs the numbers generally work out so well that people shouldn't even give wearout a second thought.  And everyone should do backups to mitigate potential data loss regardless.
-Noel
Detailed how-to in my eBooks:  
Configure The Windows 7 "To Work" Options
Configure The Windows 8 "To Work" Options