Another area that has benefited from the advance in 2.5” drives has been the Enterprise. Big businesses have found that the advantages of such drives have made them more attractive for use in servers as compared to traditional 3.5” units. Western Digital in particular has claimed that the demand for Enterprise-grade 2.5” drives has increased dramatically, so much that they expect to see 2.5” drives become mainstream for servers in the next few years.
Primary reasons cited for such a change include things like power consumption and heat dissipation, a huge concern when dealing with power-hungry servers in hot environments that must operate 24/7. Another factor has been the boost in storage capacity, where the density of storage for a 2.5” drive put them on an equal playing field. It'll be no big surprise at all when 2.5” drives take over for 3.5” drives altogether, including on the standard home desktop.