I&#x27;m guessing power constraints. More flash you have, more power you&#x27;ll require.  Even increasing power consumption deltas minimally may impact battery longevity between charges on mobile devices enough to make it unfeasible with current battery tech.<p>&quot;Power is an important consideration because the design of flash memories is closely tied to the power budget within which they are allowed to operate.&quot;
<a href="http:&#x2F;&#x2F;cseweb.ucsd.edu&#x2F;users&#x2F;swanson&#x2F;papers&#x2F;TransOnCAD2013.pdf" rel="nofollow">http:&#x2F;&#x2F;cseweb.ucsd.edu&#x2F;users&#x2F;swanson&#x2F;papers&#x2F;TransOnCAD2013.p...</a>