Consider long-term-archival features
It would be very useful to have at least one of the compression formats used default to having some sort of recovery data, so that bitflips and small errors can be recovered from, making it useful for archival.
The list of formats that support recovery records is listed at: https://en.wikipedia.org/wiki/Comparison_of_archive_formats#Containers_and_compression
(doesn't look like any of the 3 default options support recovery records :/)
See file-roller#51