I'm not sure what you are on about, the prices of SSD dropped by a factor of 3 or so from 2013 to 2016. That's more than HDD. At the same time, SSDs got faster

I'm not sure what you are on about, the prices of SSD dropped by a factor of 3 or so from 2013 to 2016. That's more than HDD. At the same time, SSDs got faster and faster, while HDD speed is essentially constant.