Of course the attraction of the PSD was not in stock trim but the almost unlimited HP potential available if you made some modifications, whereas we're clearly limited to around 250HP and 500lbs-ft on the IDI without some extensive engine mods to handle it.
You have to remember that we are the minority here. The vast majority of diesel truck owners never modifiy them or even want to. They keep'm stock and just do maintance only. For a few, "bomb-ablity" will attract them to a PSD, but for most, that's not part of the purchase decision.
Heath