This is valuable (as I understand it, they are using a metaphor for virtual machines), however the need for this in most cases could be obviated by using open d

This is valuable (as I understand it, they are using a metaphor for virtual machines), however the need for this in most cases could be obviated by using open data formats. The problems of physically degrading storage media, "bit rot", and the ability to interface with obsolete technology are also a big deal