...and it strikes me as a more reliable choice in economical transportation than the newer Smart Fortwo, despite that car's internal-combustion-only drivetrain.
This is just nonsense. A hybrid vehicle, by design and definition, contains two completely separate drive systems, and a control system to integrate the two drive systems. And when one factors in the NiMH or Li-Ion battery, in addition to a hydrocarbon fuel system, another level of inherent complexity is added.
So, just how is this possibly "a more reliable choice...than.. [an] internal-combustion-only drivetrain"?