Upload & Sell: On
Superb bit of work! Thank you very much. We seem to be seeing what - in reference to Adobe products - much of what has been shown on other platforms: That processor speed trumps all other factors. Adobe does make use of cores and seems to do some threading, but I doubt anyone is willing to argue that they have aggressively pursued hyper-threading and it's very clear that, at least with Lr, they virtually ignore the GPU.
The cost/benefit analysis is going to be tricky because in addition to the base machine one has to likely add external storage and - at least in my case - I'm doubting my 7-8 year old 30" Cinema display is going to play well with the new gpu. Could be wrong. I think you stated it best when you note that Apple has once again pushed new hardware past current peripheral and software support. They've been doing this since at least the introduction of the Mac itself in 1984. I clearly remember listening to some computer expert in a NPR segment lamenting the fact that Apple had chosen the 3.5 "floppy" format when the industry standard was still 5.25. He announced the impending death of Apple. For those of us with long term connections to Apple that's a monotonous chant that accompanied virtually everything Apple did in those days. Odd that we don't hear it much any more.
15bit and others. Just to add to the confusion, I recently updated my 2010 dual quad Mac Pro to a PCI-e SSD boot and application drive. The change is remarkable. I can say unequivocally that Lr operates faster particularly in the module swapping phase. I use to sit and wait while it decided to move from Library to Develop. Now that switch is near instantaneous. As for whether or not it speeds up specific actions in Lr, that's not as clear. Still studying it. I can also concur Bif in noting that no significant speed difference between Lr 4 and Lr 5 on the same hardware.