Re: WD Market Segmentation Blot
IS it worth the cost and time and effort to sort out? If not, just go for CMR.
If it's worth the effort, you can test, test and test again for this new type of drive behaviour (SMR that does not report as SMR and hopes you can trust it to do things right, and not do garbage collection at the worse time).
At least so far with SSDs they learnt their lesson, and most will be made to have decent garbage collection speeds and controllers that can cope with it (though I've had at least one SSD that died after 15 mins ever single time after a firmware level clearance of the entire drive, so good, it never worked!).
Sometimes you *can* do something and make new technology. But you need to ask if it's worth the hassle, and if there is a use case. Here SMR can be used in some types of NAS, and in others... it might chug.