Why no Vista 64 bit compatibility for Lightroom 5?

Please don't point me to the system requirements; I've already read again and again that Only Windows 7 or 8 are compatible with LR5.
What I want to know is WHY was Vista 64 bit supported with the Lightroom 5 Beta but now not for the current full release of LR5? Sucks to have been led to believe Vista would still be supported, due to the inclusion of VIsta 64 support on the Beta version, only to find the full release does NOT support VISTA.
And does "not supported" mean it truly won't install and be useable with Vista 64, or does it simply mean you won't provide tech support?

mike.bartelt wrote:
it far exceeds Adobe's "System Requirements".
We were talking about installing w7, not Lr, right? Anyway, I had trouble installing Vista on my system (hardware was not approved for Vista), but once installed, it purred like a kitten... I'm guessing you could get w7 installed if you were willing to try some more... On the other hand, if you've had enough trying, why not patch the Lr5 installer and use the w7 disk for a coaster?
mike.bartelt wrote:
If you look at the requirements, it makes absolutely no sense.  I can't imagine how Windows 7 would run on a P4 with 2 gigs of ram on a monitor at 1024x768, let alone trying to imagine how editing huge RAW files in LR5 on that system would work.  How could anyone recommend that?
Youre not the first to notice a "paradox" - my guess: Adobe hasn't attended to the processor spec in years and it can be ignored - if your OS meets the spec, good enough... just a guess though.
As I'm sure you know - minimum sys.reqs are not intended to be optimal, but, well, minimum (e.g. suitable for preliminary trial but not for extended use). Lr will run with only 2GB, but most people will recommend at least 4 and preferrably 6 or 8 for optimal performance.
Rob

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