Oh I don't doubt the efficiency and robust build quality of the Speakons, etc, but in the end it really all boils down to the efficacy of the lowly Faston connectors (spades) used on the drivers, most networks, and the NL8s. I really doubt the Neutrik bananas are a weak point in most systems. Short of soldering everything, I'm good with them.
We do use Speakons exclusively in the high-power SR systems I help with. Foolproof and positive. The pride of Lichtenstein.