340 cam specs?

And I don't get how guys get all hyped-up to bolt-in/on the factory 340 automatic cam in a smogger-318, with X heads.
I did that and it was a disaster, with the only saving grace being gears and TC, which took it straight out of the realm of DD. It was a terrible idea in 1977 when I did it, and without a boost in compression, I expect it would be just as terrible today.
So riddle me this; why do guys keep saying that it's such a great idea?
BTW; I got 4 slightly used 340 cams, from back in the day, I could sell.........lol.