I think the period of the trains might go out of date, with a few exceptions — though it might return to fashion once it's beyond living memory. So a collectio

I think the period of the trains might go out of date, with a few exceptions — though it might return to fashion once it's beyond living memory. So a collection of model steam trains might lose value, as fewer people have remember them in use, but the hobby can continue with high-speed electric trains etc.