Z80 doesn't imply a desktop. See e.g. the Cambridge Z88. A Z80-based computer is also significantly easier to repair with rudimentary tools, and to create from

Z80 doesn't imply a desktop. See e.g. the Cambridge Z88. A Z80-based computer is also significantly easier to repair with rudimentary tools, and to create from scavenged parts, than an Android device. It can also be powered from pretty much anything, making for a great tool in an environment which is at risk of losing reliable widespread power distribution capabilities and which probably cannot create new li-ion batteries.