All indefinitely means is “not certain”. So it could mean a week… Or a century.
These disks are pretty well understood. You should be good for a decade. At about 12-13 years it’s risky and anything after 15… If it’s still working, count yourself lucky.
Jan 16, 2008. Got me beat by a bit. Beat you to Lemmy though, so I guess I’ve got that going for me.