I mean, there is one way. Technically, information can never be completely destroyed- there’s always some way to recover it, no matter how complex and difficult. If we were to build a supercomputer capable of recovering the brain structure of those who’ve already died, we could save even them. The idea is called quantum archaeology, and even if it’s a long way off, it doesn’t matter- because all that means is a larger backlog of people to revive. Of course, this is assuming it’s possible to implement in practice, which we really can’t know yet.