As Ron Popeil said, "set it and forget it" (except, with an electronic ignition, Pertronix in my cases, you just install it and forget it).
I do not know and I do not care if my trucks have a hotter spark or better gas mileage. I do think they start more quickly with the Pertronix in than with the points in, but this is not based on "scientific" evidence.
Yes, I have read about other truckers' Pertronix-failures but, after 13 years, I have not experienced any failures (two sets, 6v and 12v Pertronix on 235s and 261). I'll probably put a 6v positive-ground Pertronix unit on my 54/55 GMC 270 engine next summer.
I carry a back-up distributor with points/condenser as an insurance policy (it will work in all my GM trucks).
There is nothing wrong with using points/condenser.
