That's certainly true. However, what's of relevance here is how long coin collectors have been using those small plastic wallets. I don't know for sure but suspect this is an innovation that doesn't date back that far. Vintage coin collecting albums I've seen are pages made of thick board with holes cut for the coins top be placed in. In the alleged case of Mr Squirrel, the more pertinent question would not have been when the company stopped manufacturing these envelopes, but rather when they started.