The disease may not be as destructive of memory as previously believed. That means that if they can come up with a cure, or ways of repairing the neuronal damage, people may be savable as the persons they were. This would reduce the attractiveness of the cryonics solution for them, if true.

[Update in the afternoon]

I should clarify that last sentence, per the question in comments. What I mean is that it would reduce the attractiveness of cryonics as a cure for Alzheimer’s. That is, if you believe that Alzheimer’s is destroying your mind, you’d like to preserve it before it’s all gone, so even though it’s currently illegal, it would be desirable to have yourself frozen now in the hope that they can repair you in the future, rather than the empty husk of the Alzheimer’s-addled you, from which all knowledge of who you are is gone.

This research provides an alternative. Let the mind go, if it can be brought back with future therapies, even before you’re suspended, without taking the risk on freezing it.