I know there's a lot of concerns about generative voices, but it's a shame the only solution is 'insist on a live recording of random phrases'. For those whose voices have already degenerated, but who have hours of recordings available from historical sources (e.g. speech therapy sessions), it's too late to ask them to record something fresh.

Don't get me wrong, it's fantastic to see the tech being used this way. My Dad has lost most of his speech due to some kind of aphasia-causing condition and if this had been available just a year or two ago it could've been a big help for him; it's reassuring that others earlier in the journey will benefit from this.