For digital drift: anything content-addressable (e.g. using git and referencing SHAs) is your answer. Continued availability and support, though? If you can ans

For digital drift: anything content-addressable (e.g. using git and referencing SHAs) is your answer. Continued availability and support, though? If you can answer that question, you should probably quit your current job and use your divination talents in more profitable fields.