It doesn't have to cost a lot.
There are commodity cases, power supplies, peripherals, etc. out there. And if you spend a reasonable amount on them (like half what apple is charging) good quality parts are available. At retail cost! Never mind what apple could get at cost/trade price, in bulk!
All apple needs to do to make it their own is stick a t2 chip on it to support their apple special features (or similar) and call it a day.
An entry desktop mac without a monitor, but with expandability shouldn't cost more than $1000-1500 US, talk if $3k being baseline is no better than their current pricing.
That Mac Pro case is likely very expensive to make (due to machining intricate shapes in it from blocks of aluminium). And as a potential xMac user i just don't care. I'd rather spend the money on a blower for my car or whatever. The case looks nice, but its not nice to the point i'd pay what they're asking for it. And i would wager it cools no better than a properly cooled PC with well chosen off the shelf parts.
yea Apple will NEVER EVER EVER EVER use commodity cases etc. the case costs some money, but it’s not $4000. I think your sense of pricing scale is way off. And says you with regard to $3k. Some will say $1k is too much. The reality is the 2010 5,1 Mac Pro had a starting price around 2500. Cost adjusted, that’s Around 3k now.