Macdrone said:

If he waits too long there won't be a 400 k floppy with the ability to prove its that software on that disk.

But whatever to each his own.

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And not to mention the media will start to degrade over time. That is becoming a big problem with vintage reel-to-reel tapes, the ferric oxide, and other materials used to make the tape is starting to fall apart, flake off, turn into goo. 

Floppies are made in much the same way.