Search Trends vs Page Views

As we all know the original SCSI interface is in decline and has been for a number of years now. The 'old' parallel bus is up against Fiber Channel [FC], Serial SCSI [SAS] and Serial ATA [SATA] to name a few of the possible Hard Drive interfaces.

In fact I found a chart of Worldwide HDD Shipments; All Form Factors by Interface, 2008-2012 [produced in 2009], units shipments vs year. The chart indicates that SCSI may have had a few percentage of the total units shipped in 2008, but is all but gone in 2009 and beyond. Seems right to me, of course there still must be a large amount of units still deployed even now, regardless of SCSI being obsolete. Their projection for 2010 indicates that 90+ drive units shipped would contain either a SAS or SATA interface.

But almost no SCSI drive was ever used as a personal 'home use' HDD interface, as the SCSI interface was always more expensive than an IDE drive interface. So most people would have never even had a chance to worry if they had an out-dated SCSI interface in their PC.

So as SCSI searches [on Google] dropped 90% over the last 4 years, SCSI page views on interfacebus have been flat. So why is that? The trend line above shows a tremendous drop in searches over the last four years, but visitors to this site remain constant. That tells me that over the previous last few years I've missed out on a large amount of incoming traffic. Were the pages on this site always relegated to some small portion of the key words, I guess there's no way to tell. Normally I don't like to finds pages that are in decline, but in this case I wish I did. Only because now I know that for a vast amount of internet searches related to the SCSI bus this site was never used. Any way; here are the rest of the pages that make up the SCSI section;
SCSI I interface description.
SCSI II interface description.
SCSI III interface description.
SCSI VI interface description.
SCSI V interface description.
SCSI single ended A cable, and  SCSI differential ended A cable.
SCSI single ended Q cable, and  SCSI differential ended Q cable.
SCSI B connector, and  SCSI P connector.
SCSI HDI-30 connector.

SEO advice; I don't have any optimization advice this time. Although pageviews to this SCSI related section have been constant, they have been consistently low.

Side note; I tried looking up 'Hard drive market forecast', HDD Sales trends, market volume and so on but I could only retrieve a table of contents to reports that had to be purchased. So finding the data is a bit hard and took a number of searches to uncover.
Graph: From Google Trends, using the search term SCSI [2004 to Jan 2010].