I think it comes down to personal preference more than anything. I dont think anyone can prove that the gybing boards on the original cap and the infusion mark 1 didn't work. Like i said i think it was fashionable to lock them off so thats what everyone did.

This is pure speculation, but my theory is that if your a pincher, then you want your boards locked off. If you like to put the bow down a bit and give the boat its head then you want gybing boards. You can see in any fleet a range of sailing styles. Not sure if this makes sense but im running with it until i find a better theory.