Good point. But are we heading to a world where we can´t add memory to our iMacs you think?
Yes. Maybe not tomorrow, but if the next major re-design of the iMac lets you buy an 8GB model and easily fit an
extra 16GB for less than Apple charges for the 16GB
total option then... who are you and what have you done with the
real Tim Cook?
Apple permits the addition of memory if you take it in to an Apple store. They will do it for you if you do not feel comfortable doing it.
What, you can turn up at the local Apple store with your iMac Pro and 32GB of cheap third-party ECC RAM and while-u-wait they'll cut through the screen adhesive, remove the screen, unplug all the cables, remove the main board, fit the RAM (that you didn't buy from them) then re-assemble it all and fit new screen adhesive for you, and you'll pop a few bucks in the tip jar on the way out? Colour me skeptical...
Yes, I believe that you
can have your iMac Pro RAM upgraded at an Apple-approved service centre - if you pay generously for the service (including Apple's price for the RAM). That simply doesn't compare with the current 27" iMac where its a two-minute, tool-free, no-experience needed, non-warranty-voiding job (which, yes, I can believe that a good Apple Store might help with).
So nothing other than the Macbook Pros we got in July?
The rumours about the new
low-cost MacBook/Air replacement seem rather less nebulous than the iMac ones - the latter just seem to be speculation based on the availability of suitable CPUs. It was slightly odd that all the MBPs except the non-TB ones got updated in July. Oh, and the new Mac Mini is almost certainly coming :->
Holding back the iMac to preserve iMP sales seems unlikely. The iMP is relatively low-rate seller, especially for home users and its performance components extend well-beyond the CPU.
The top-specced 5k iMacs with 4.2GHz i7 and 1TB SSD that cost $3000-$4000* probably aren't huge sellers either - and customers considering those
certainly include potential iMac Pro buyers. A 6-core processor on the iMac - and maybe a
quiet i5 hex-core option that outperforms the current i7 - plus GPU updates, would encourage those people to stick with the iMac. (I'm guessing that the iMac Pro won't be on an annual update cycle, and that a price cut would be proceeded by the appearance of grit-spreading trucks in Hades - so any improvement in the regular iMac would close the gap).
If they're going to re-design the iMac to appease the thin'n'light brigade, then I think it would actually make sense for it to max out at hex-core i5 if that was easier to keep cool.
(* yes, you can push the regular iMac price over $5000, but then you'd have to add the 2TB SSD, 64GB options to the iMac Pro price, too).