The problem is that 'extensible' is often used as code for "able to immediately upgrade to the spec I actually want while paying the least possible to Apple". Put me in that category, I always buy desktop macs with the minimum RAM and upgrade immediately.
The thing is, if you want an iMAC Pro with a top of the line CPU, card and hard drive you'll just have to buy it from Apple that way. There's no point complaining about it, that's just the way it is. You just have to make sure the spec you buy is the spec you will actually need and for very many creative professionals a well specced Mac Pro will be absolutely fine.
> The problem is that 'extensible' is often used as code for "able to immediately upgrade to the spec I actually want while paying the least possible to Apple".
Although on one hand that was a valid market segmentation strategy. Enthusiasts can afford the base spec model and upgrade it, and "Pros" (as defined by this new model - people with unlimited corporate expense accounts) will spec their machine with Apple so that it's warrantied and supported.
The thing is, if you want an iMAC Pro with a top of the line CPU, card and hard drive you'll just have to buy it from Apple that way. There's no point complaining about it, that's just the way it is. You just have to make sure the spec you buy is the spec you will actually need and for very many creative professionals a well specced Mac Pro will be absolutely fine.