I have run across many a posting that claimed that "anything Pyro can do, a less dangerous formula can duplicate". Usually in connection with some product or developer that the poster is championing.
First thing is I have never seen any of this duplication demonstrated by side by side visual proof. It has always been a case of "a friend of a friend", "me and my buddy", or "after XI number of years my judgement". Please show me proof- negatives, prints, something I can see for myself!
Second- Has anyone done a statistical study that show that Pyro based formulas are any MORE dangerous than some other formulas. Has any recognized study ever linked any disease with the use of Pyro base formulas by photographers.