A report in today's UK edition of The Register compares SSD takeup and popularity with HDDs and finds that SSD are falling by the wayside month by month. The reason? They can't keep up with the capacities now being squeezed from HDDs (Hitachi currently sell a 6TB hard drive) and the cost per megabyte of SSD storage is significantly higher that for HDDs.
All this is good news for you and me - HDD's are cheaper to buy the SSD's and also considerable easier for computer support companies to maintain.
You can read the full article in The Register here: http://www.theregister.co.uk/2014/12/09/no_flash_datacentre_takeover/