Well, even normal BD is very resilient, apart from delamination. But that's a gradual problem you can preempt with multiple parity discs for each bundle of data

Well, even normal BD is very resilient, apart from delamination. But that's a gradual problem you can preempt with multiple parity discs for each bundle of data discs, along with periodic checking of the discs (delamination is optically quite obvious).