It makes you wonder if there were ever any good derringers. Yet they were manufactured for a long, long time, both one and two shot varieties. All were on the weak side but I suppose they had their devotees. At the same time you could also get small revolvers and small automatics showed up on the market arount 1900 as well. But you can still buy a derringer.
I think there's a place for them, although not in .45/.410 chamberings, much less .357. A derringer is clearly a last resort hideout gun. Sure, it takes a little practice and forethought and it is something for across-the-table shooting distances, same as a .25 auto. And unlike all those .45 Government Models you only think you're concealing, you really can hide a derringer--or a .25 auto.
Not that I have one.