Definition - What does Digital Amnesia mean?
This is also known as digital obsolescence.
Techopedia explains Digital Amnesia
As more versions and innovative ideas develop, old versions of programs created by a company will become obsolete because they cannot be used with the new system. For example, Microsoft Works versions that are below 4.5 cannot run on Windows 2000 or later. There are even programs that are currently in mainstream use that will not work properly on Windows 7 machines; compatibility mode needs to be enabled in order for them to work. Making a new program backward-compatible with older file formats is one way of avoiding this problem.