You have to look at the bike in it's context:
At the time the K0 was introduced, it was like nothing else on the road. It was the first bike to offer a disc brake, electric leg, 4 cylinder SOHC motor and 5-speed gearbox in a street-legal package. Plus, it was a steal at just under $1,500. Sure, these weren't new innovations, but Honda was the first to put them all together in a standard, affordable package. You could get a 4-cylinder bike from, say, MV Augusta- If you were the CEO of General Electric. Plus the "Sandcast" bikes were rare enough to begin with, only some 7,000 or so made. Who knows, if they only made a few thousand Pintos, between their small numbers and reputation for a firey death they might have attained some sort of cult status. The Pinto broke no new ground. It came from a time the American auto industry would like to forget. The CB750 Ushered in a brand new era in motorcycling. Before it came along, most motorcycles had spotty reliability and being relatively crude pushrod twins, shook alot. The silky-smooth 750 changed everyone's perception. Honda broke it's back with all the R&D and testing that went into the new bike to make it (despite it's flaws) the best machine on the road. Did Ford do that with the Pinto??
Now, of course, a modern bike of half the capacity can easily blow the sidecovers off a 750. That's to be expected. Technology will keep progressing. Hopefully, cars nowadays don't blow up so easily, either!