Why torpedo nets lost their appeal

Why did Victorian-era torpedo nets fall from favor by the First World War?

Their weight and drag reduced ship performance, while damaged nets could become a hazard of their own by fouling propellers; the trade-off worsened as operating speeds rose.

The answer treats torpedo nets as a trade-off rather than a simple protective upgrade. They were manageable at low speed, but their weight and effect on performance became more serious as fleets operated faster. Damage in a seaway could also leave netting around the propellers, turning a defensive measure into a mobility problem at exactly the wrong moment.