Hi, Stephen. Sign me "extremely creeped out" by just the concept of replicatig dead people's voices, let alone its execution.
The little electronic voice that speaks to me in my left-ear hearing aid every morning, announcing "Left Ready" when I connect its battery, is about all I can tolerate. It also tells me what channel I am on: "Universal" (outdoors, quiet indoor settings); "Music" for listening to TV and radio; and "Zen", a marvellous white-noise generator that plays a harpsichord on very low volume, allowing me to hear conversations more clearly.
Thanks for the heads-up. I don't own an Alexa, and now I am even less motivated to get one.