Immune, no. Far less prone to bit rot? yeah. My source is running backups for a significant fraction of a large univiersity for ~20 years. We had a routine

Immune, no. Far less prone to bit rot? yeah. My source is running backups for a significant fraction of a large univiersity for ~20 years. We had a routine cadence of tape errors, which were much less frequent than our routine cadence of disk replacement. I suppose that's anecdote. :) But it's what I've got.