Yes but if all you need is 32 or 64 gigs
I'm genuinely curious what workflow is going to be sufficiently impacted by 32 vs 28 cores, but also only uses 32 or 64GB of memory?
Storage, GPU and CPU cores are all woefully inadequate in the $6,000 model
For what task?
For anyone doing software dev that isn't specifically GPU related (i.e. most of us) the base GPU is more than enough - it will run 6x 4K displays. I'm actually expecting they'd offer the rack mount version with an even lower spec video card, possibly in one of the x8 slots, so the extra x16 slot can be used for other PCI cards that are more use in a build server/etc. The point is, not everyone needs or even benefits from a giant video card that occupies two slots and a heap of PCI lanes.
For anyone working in an established commercial setup, there's a reasonable chance they have a SAN or NAS for storage. Heck some workflows are just easier with portable storage - I use an external M2 based storage device for my work, specifically so I can move to a MBP literally at the drop of a hat. Others will have other needs. Yet again, the point is not everyone has the same requirements.
The CPU I can
kind of see your point - it'd be nice if they started at 12 or 16 cores, but even then, not
every task is heavily CPU bound. Some may have other requirements that have more impact on their workflow.
So, let's take the above and look at realistic upgrade prices to see where this mythical "$12K" comes from.
In terms of storage, both the 16" MacBook Pro and the iMac Pro will upgrade from 1TB to 4TB of SSD, for $1000. If you get the lower spec MBP it's $1200 to upgrade from 512 to 4TB.
So, picking a nice round number, in line with the above options, I'd expect maybe $800 to go from 256 to 2TB (same as the mini) and $1500-ish to go from 256 to 4TB. It's also entirely possible this will be an aftermarket upgradable feature.
The GPU I don't really know - a regular iMac is $450 to go from a 580X to a "Vega 48". An iMac Pro is $700 to go from a "Vega 56" to a "Vega 64X". But then online outlets have suggested a single Vega II is going to be priced similar to the Quadro RTX series, which apparently are in the $6K range on their own?
Tray price differences between the W3223 (8 core) and W3245 (16 core) is apparently about $1250. The price difference to the W3275M is about $6700, if anyone cares. What's apple going to charge for this? The iMac Pro seems to use custom chips, but they have a lot of similarities with other more mainstream processors in the same series, so comparing the prices of the W-2145 (iMac pro uses W-2140B) to the W-2175 (iMac Pro uses W-2170B) and the W-2195 (iMac Pro uses the W2191B), tray pricing differences vs Apple's iMac Pro upgrade pricing indicates about $1000 extra for Apple prices compared to the Xeon tray price difference for similar models.
So, I'm not even going to consider the GPU because (a) there is literally no reliable clue on pricing and the only
guess prices a single card at the same price as the entire rest of the Mac Pro.
But if you wanted to upgrade the SSD to 2TB - it's not unrealistic to expect that'll be in the $800 range, if you need more onboard. For memory, you can go from 32GB to 96GB for as little as ~$400 if you just add 8 more 8GB RDIMMs. The CPUs are a bit of a guess too, but it seems like maybe $2K-ish to go from 8 to 16 cores?
So, while your comment was "it's all woefully inadequate" rather than about upgrade pricing - I
still don't see (a) how people come up with "$12K for the minimum required BTO/upgrades", and I flat out disagree with your premise that it's "woefully inadequate".
Having really high end options as the bare minimum is exactly why I didn't buy a 2013 Mac Pro, or a 2017 iMac Pro: I have no use for a (for the time) high end GPU, much less two of the ****ing things, in the case of the 2013 Mac Pro.
What was truly missing from the 2013 Mac Pro, that the previous Mac Pros had before it, was the ability to customise. That's what the 2019 Mac Pro brings back. You want more GPU power? Great, upgrade that part. You want oodles of memory? Super, upgrade that. But to assume every workload has the same hardware requirements is ludicrous.