macOS doesn't support anywhere near that number of application threads (max 64). The rest of the Mac line up and iOS/iPad OS devices don't need more than 64 either. Apple forking macOS just for one, extremely low volume Mac product is pretty unlikely. If that is a hard core requirement might as well jump onto a Windows/Linux dual Xeon SP or Epyc box at the end of 2022 (or Threadripper 5000 ).
Two 16TB U.2 drive will get to 32TB now with a single x16 PCI-e slot now.
Fusion Dual U.2 SSD PCIe Card - Tech Specs - Sonnet
View videos and tech specs for Fusion Dual U.2 SSD PCIe Card, and determine hardware and OS compatibility.sonnet.webflow.io
Two slots and four drives would be 64TB. ( more later when higher capacity U.2 rolls out).
Apple doesn't need to provision the SSD themselves. They need to provision the slot(s) that can provision high capacity. At that point there will be multiple ways over time to provide more higher than "average speed" internal storage.
( The part should be nervous about now on Apple's SSD drives is if they are going to abandon the NAND Data cards (SSD's modules) or push soldered all the way down up to the Mac Pro also. If there is no "big" iMac to be another consumer of these modules then Apple may go cheap route (for them) and solder them down. Bad idea for customers but more money for the Scrooge McDuck money pit under HQ. )
The major problem at the moment is they are no were near provisioning an electrical x16 connection. Let alone two x16 connections with any of the SoCs they have rolled out.
If all they have is a M1 Max with UltraFusion connector is perhaps build a PCI-e expansion module and attach that to a Max via the Fusion connector. And then claim that it isn't another M1 Soc. Or perhaps once again 'hid' something in the UltraFusion connector interposer die to get them some lane provisioning .
Even going from TSMC N5 to N3 and taking only maximum power reduction benefits is only a -30% reduction in power. So about 160-170+ W and that reduction .... 112-119 W. That still wouldn't happen. The M2 either has N5P or N4/N4P which are small fractions of that reduction. Not going to happen at M2. M2 may not even have a new Max let alone a new Ultra. M2 and M2 Pro ( with some narrow tweaks. a couple of GPU and/or E cores tossed in. And an A-series , small scale ProRes tossed into the M2. ). The will be an incrementally faster M2/M3 Max along the way in a year or two that will probably suffice.
Maybe around M5, M6, or M7 generation; you have many years to save up for that system in laptop. And only if Apple doesn't "thin out" the MBP 14/16 in the mean time. (e.g., future, faster Max at lower W allows them to trim off from the MBP without backsliding. )
It would be nice if some people stopped telling other people their opinions are wrong on what they would like.
