@nprofile1q... As somebody who is coming from the opposite side, (computing history) where most of our artifacts arrive in proprietary formats:
Given enough nerds, all self-contained data-formats where sufficient artifacts are available, can be reverse engineered.
The "self-contained" is the important part, any format which needs input (encryption or license keys) from external sources is deeply problematic, and must be converted while that information is available.
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