Can you read data off a floppy disk today? How many others can? How many in fifty years can? The point is that left alone our physical media of today is not compatible in the future because you need specialty tools to read it.
Anyone can pickup and read a piece of paper or a rock with carvings in it. The point is that not only does the media need to survive, but the means to make use of it needs to survive as well.
That is the key issue with technology today. Someone needs to keep loving the data from floppy to zip drive to thumb drive to hard drive to whatever is next or it's lost.