> "Invest in a Faraday pouch but replace it every couple of years," he said, "because they become less effective over time."

From: https://www.bbc.co.uk/news/articles/c5yp08kmk4eo

Is that true? I get that a pouch might get damaged, or that repeatedly opening and closing it might break some of the metal strands. But surely that should be negligible, right?