>> (Still "single-sided" means
>> that most of the stuff on the PCB will be "thru hole").
>
> I don't know where you got that from.

Single-sided PCBs don't make sense if are a little cheaper than double
sided because double sided offer considerable PCB space saving. To be
seriously cheaper single-sided PCBs have to be manufactured from very
cheap materials. Such stuff can't hold copper stripes with SMT
components reliably after heated. That's my version why I don't see
many full SMT single sided PCB. Perhaps there are other reasons as
well.
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