Been a long time coming
Given the crash in SSDs prices. I suspect the reason it has taken this long, was purely due them holding excess stock of rust drives! But I expect this crash will be reversed, as suddenly "Corona virus" becomes the next tech bogey man.
As for HDDs, I've been following the price of these for the past couple of years (I have a couple of NAS boxes, and always looking for the next upgrade) - 4-8TB HDDs are still around the same price they were 5 years ago, we're not seeing the usual price reduction that occurs when new generations and higher capacities become available - call me a pessimist, but I'm begging to suspect price-rigging by HDD vendors.
Biting the hand that feeds IT
