Also if you go via a Dell sales rep you easily get 10% extra off that "sales price" for low volume buyers and if you are a large volume buyer you can easily get as much as 50% off the list price even for high ticket value items.
At Dell/HP/Lenovo meanwhile half their products are "on sale" the same way that furniture stores have "sales" - its "sale" price is basically it's real price.
When you're talking about numbers like that for individuals, 15% is a lot. Even businesses would care about a 15% increase in costs
It's actually a "Pro" product.
The iPad Pro doesn't have any TB ports and the Macbook Pro and iMac Pro only have 4 each so I think 12 is simply unnecessary for the "Pro" moniker in addition to greatly exceeding most people's requirements.
Maybe if Mac Pros were designed for animation studios or something niche, the pricing would make sense.
It's list price is $4,420.29 which is still about $1500 off. But that comes with Windows that supports 4 cores so you would need to upgrade to the 4+ cores one thats another $100 so more like $1400.
So basically $1400 is the difference between a top tier Dell and a top tier Apple. Still a fairly large margin, but after a certain number the amount matters less. People who are buying $4500 computers typically don't care about spending another $1000.