There's one HUGE piece of the evidence missing in this whole scenario. That's this simple fact; Samsung had to have their patented fabrication process already in place and lines already operating in order to begin production and ramp up of any 64bit bit chips. We do however know that Samsung was the first ARM licensee of the A50 64bit chips. Which is logical because Samsung has always been their Lead Foundry under the Common Platform Alliance. Whose other members include everyone that isn't Intel's Gate Last process.
Naturally these others like Samsung, ARM, Global, Freescale, STMicroelectronics, Infineon, Toshiba, etc all rely on IBM with it's premiere expertise in chip manufacturing going back even further in the history of Computing than Intel, to lead the...... WAY!
So Samsung actually went into ARM A50 64bit chip line retooling, test chip series fab sampling and subsequent ramp up before full production of those chips can even take place over the last year. Any assumptions that a fabricator already doesn't have division firewalling in place isn't familiar with how tightly even those fabrication production technologies and patented processes are run. If a customer is planning to take production of their chips to a competitor, what do you expect them to do, just hand all this IP and information over to Apple to take to Intel and TSMC? That's about as asinine an assumption as it gets. Every chip Fab & Design House puts in place special measures and NDA's for employees, both in and out of their employment, to not share secrets. Which both ARM and Apple are only two Design House Only chip designers. Intel, TSMC and Global are Fabrication Only chip makers. Others like Toshiba, Samsung, IBM are considered end to end Production Houses with all those Firewalling measures put in place to protect themselves and their always highly valued customer's best interest!
I would like to point out that companies like IBM and Samsung employ intermediary engineers that are highly trusted employees who know both sides of Design and Patented Process Fabrication Technology and each side (customer and fabricator) both pay a portion of their salary. Their heads are literally on the line and any transfer of technology can always be traced back to them. That's why you never hear of any technology transfers. Except in rare cases like that in Samsung claiming/suing LG for stolen OLED technology!
Now back to the really killer ARM, SAMSUNG, STMicroelectronics, etc and the other Alliance in the HSA Foundation for Heterogeneous Computing Platform. No doubt you already know AMD started this group back when they first bought ATI in order to bring about shared memory concepts to enable seamless cross platform computing amongst entirely different chips, including x86 and ARM chips with either ATI or any other HSA members GPU's and sub processors. This is how SAMSUNG intends for their ARM leading "big LITTLE" chip platform to have greater processing power than Apple's A7. They have taken an A50 series CPU and coupled it with A7's (which is putting both dissimilar GPU's and CPU's) together in ONE SoC Chip! ......these lines were retooled last year and ramped up now since January. Did Apple somehow get in on a ARM HSA partnership without being a member of the HSA? It's highly doubtful, because they are not in the habit of sharing technologies like these two other group's members. But they are most likely using the same 64bit retooled and ramped up lines as Samsung themselves are using right now for an unreleased product. Because it is now confirmed that Apple is indeed using Samsung's Austin Texas State of the Art Foundries with now over 12 Billion dollars invested over just the last three years!
Until and unless Apple actually comes to grips with making a break with their legacy secrecy and Think Different non co-operative past, well before that HFS+ 2040 Bug hits and designs another file system to compute they will be the only lonely corporation lost in their past instead of creating a better future NOW. They need to incorporate or steal a clone of IBM's "Pervasive Multi-threading" to enable computing throughout their entire software and hardware stack. Until such a time, they will be a slave to their own 70's MFS based HFS file system, with it's 90's Plus "Preemptive Task Management" stacking tasks one on top of the other until that bug hits. Which is instead with IBM's technology, disseminating tasks all running concurrently on different cores. Pop in HSA's Platform Alliance, where they can add full API-less Cross Platform Computing for the Ultimate Win against even Intel! ......which only recently made Heterogeneous Cross Platform Computing a..... PRIORITY! ...as if they came up with the idea in the first place and as we all know it's actually AMD that made the first move many years ago in buying ATI!
There you have it, the rumor mill has been silenced and we now know why Samsung's Octa bigLITTLE and AMD's HSA Fusion Chip Future will undoubtedly RULE with IBM's process technology, in the Common Platform Alliance, that includes that Juicy full ARM Chip Design and Instruction Sets for their own 64bit chip computing future!!! .......where they've learned two or more heads are always better than..... ONE BIG FAT ONE!!!