The 7601 why? Because it is the most expensive one? The 7551 is slower ( same core count but 200Mhz base clock drop ), but it is also about $1000 less expensive. So it probably comes in a bit slower than Xeon 6154 at about $100-200 less in cost. For a buy of 50-100 scale out servers that is $5,000-20,000 more money left over. It could mean just more severs. Both of these Xeon SP and Epyc are more server oriented offerings. There are some relatively limited single user corner cases where they are a better fit than the Xeon W ( or Threadripper) but for a broad customer range workstation they aren't good fit.
Same "scale out" advantage for the ARM chip, that's why they'll sell. If can beat the AMD and Intel offerings by $100-400 then when buy in significant numbers the savings can go to buying even more whole servers. In the context of embarrassingly parallel workloads usually amount to better overall infrastructure throughput.
[doublepost=1527868886][/doublepost]
Technically those aren't PCI-e cards ( obviously not strict PCI cards). Thunderbolt (TB) nominally needs three inputs: PCI-e , GPIO, and DisplayPort. Corner cases can drop the last (e.g., some of these add in TB cards will "happen to work" with the DisplayPort not connected. ). However without both of the first two it won't work at all. All of the "Thunderbolt capable" motherboards i've ever seen only have one (and only one) GPIO header to plug the expansion board into.
Two cards isn't likely going to happen any time soon. An extremely significantly large number of boards have no GPIO->TB header at all which is indicative of the relative importance the board makers put on it. So it is a feat to get to one. Getting two would be on a "trip to Mars' priority level for most of them.
Implicitly here you are smarter because you don't blow money, but (explicit) Apple would be smarter if they did. Running around 'buying' customers (in and of itself) doesn't make Apple smart. The previous Mac Pro and vast majority of the major workstation vendors ( Dell, HP, Lenovo) don't have hot swap HDDs as mainstream configurations.
Apple doesn't need specific people; they need customers ( as group of people. ). As long as they have a group that is willing to collectively spend at least as much money as the old group; they don't need the same exact set of people. If Macs sales volume , revenue , and profits were down over the last 7-8 years then perhaps the Mac Pro folks who have drifted away would be critical. They haven't.
"Pro" is folks doing work for significant compensation. "Pro" is not some set of system features. Features on a physical system doesn't make someone a "Pro". This who "pro" thing tends to drift into the swamp when "pro" becomes a euphemism for "my favorite features" as opposed to actually doing something.
Thanks for the info about Thunderbolt. I'm not familiar with how it all works. That sucks though. I've also only seen one board that had a TB port. Can't remember the brand. Might have been Asus/Asrock or Gigabyte. I'd have to look again.
As for the "Hot Swap" that was a tongue-in-cheek comment. I was just implying they should provide us with features (or the option for features) people can get on the PC side for workstations. This would involve options for the case as well, which I would love to see them do for their "pro" towers. Being locked into one case design (or even one motherboard design) isn't allowing flexibility for different configurations.
I personally don't need hot swap for what I do daily, but if I had the option I would take it because there's times when I could use it instead of having to use a hard drive dock. I'd be happy with an extended ATX board with plenty of expansion/upgrade options. Most guys I know are the same. They just want a Mac Pro that is fast, reliable, upgradeable, and will allow them to get their work done with hardly any downtime.
Not sure how to refine that perfectly, but something for professionals should provide you with the options for optimal CPU/RAM/GPU configs of the day that can be tailored if needed, with the ability to modify and upgrade at your discretion via expansion slots and connectivity so you can push the system to its limits and keep it relevant for at least several years to remain competitive. I agree it's not one specific feature, but there are some you tend to see offered (ability to change CPU/RAM, use PCI cards, etc) which you won't find in an iMac Pro, the last Mac Pro, or the MacBook Pro. Even many consumer computers give you those feature. Sadly I have seen more soldering everything to the board these days.