The question was not personal but general regardless of the applications (servers or desktops.) And just if you were to choose between 10K RPM SATA Raptor and 15K RPM SCSI of the late generations.
Personally speaking, my main HDDs are mostly 7,200 RPM PATA or SATA HDDs because capacity per cost is my priority, not access and seek times and longer warranty years. I don't "choose" because I prefer getting both at once usually for the things that I really care. For servers, it's difficult to upgrade frequently because they are located physically too far from where I sleep and eat daily and I don't have a helicopter.
What I was interested is whether even WD, the only one dared to make 10K RPM IDE HDDs, is giving up thinking 10K RPM for IDE HDDs isn't a profitable idea. WD gave up on SCSI HDDs some years ago because SCSI HDD market seemed to WD too small and not enough room for market expansion. Samsung once was interested in SCSI HDDs as well and actually released some SCSI HDD products but never after.