If such modules can be made to work, they almost certainly will be MUCH cheaper than Apple OEM. You can see that in all storage upgrade options at OWC now. Throughout the Intel run, those comfortable with some DIY could buy minimum specs from Apple and then "load up" from OWC to max out (sometimes beyond Apple options) RAM and storage.
However, the related question is: will the system software support anything other than Apple OEM? In other words, maybe it's not just plug in another piece of hardware that DOES fit the jack. Something in the system software may need to be activated to support the extra. I recall a few generations of iPods had an FM radio tuner in the off-the-shelf chips Apple was using. But Apple never turned on the option to be able to also tune FM. Perhaps it would be the same here... UNLESS maybe you buy the custom SSD only from Apple and only Apple can do the install?
Since several of these "reviewers" bought several Studios to break down, wouldn't it have been great if ONE of them had simply taken the SSD from one of their spares and tried it in another? I wonder what would have happened if they inserted a spare in the empty jack and booted up?
If it was recognized and usable immediately, the software "key" would already be ON and there would be hope for OWC or similar to deliver clones of the custom SSD card. If it did not work, we would already know that it will require more than replicating the hardware card (SSD) itself. Even now, I wish one of them would simply open a spare Studio, pull its SSD and put it in the empty jack of another Studio to see what happens. Does it "just work" or will this require software/firmware support from Apple to activate... if they are ever motivated to do so?
Unlike the full teardown I saw some do, this doesn't even look that hard to test. It appears both SSD jacks are relatively easily accessible right at the bottom of the device- no full teardown required. I'm well aware that some of them read MR posts, so hopefully one will see this one and make a new video in which they test this out. It looks easy and would actually be a very informative video, perhaps helpful to MANY Studio owners with storage potential questions.
If it does work now, can 2 SSDs be RAID-0ed for even faster storage?
Imagine the ability to max that: 8TB plus 8TB inside that little box... but not at $2200 + $2200.