As long as different makers continue to produce different patterns of hook, we are unlikely to see any improvement. We have talked of single hooks until now, but the double salmon hook can be thought of as a reasonably mature invention, given that the bronze age Swiss used them extensively. Venables discussed flies tied on double hooks for catching grilse and grayling, but the double hook didn't catch on overnight, and it was 1689 before one was illustrated and doubles didn't become truly popular until much later. Early double hooks were whipped together, but later versions were made by braising the metal. Cholmondely-Pennell designed and marketed a series of double hooks in the 1880's, by which time the idea was no longer regarded as dangerously novel.
Treble hooks share the chequered history of their cousins.
They had little application in fly fishing until the twentieth century, mainly being used for live and dead baiting. By the late nineteenth century, trebles were also being used for spinning, and were a source of much complaint. Hooks frequently broke, the temper having been affected during the brazing procedure. The trouble was caused by the selection of wire that was of too fine a diameter, and which became extremely brittle during the manufacturing process. It would not be until after the Second World War that trebles came into widespread use for fly fishing, as it was only then that it became possible to manufacture hooks reliably in the small sizes required.