Agent Orange
Veteran Member
The nostalgia of people who had these computers (or remembered seeing them in Radio Shack) when they were new, combined with the novelty of having a PC in a C64/Amiga/Atari-type form factor. Plus a few popular vintage computing channels on YouTube have featured these machines prominently, especially during "SepTandy".
But you're right -- except for the lack of DOS in ROM, a much cheaper and easier to find 1000SX can do everything an EX or HX can do, and has 640K on the motherboard, 5.25" drive bays, and real ISA slots.
+1 for the SX