[progman32]

Hawking turned down the use of new voices! https://en.m.wikipedia.org/wiki/Dennis_H._Klatt

[genewitch]

My naive understanding is that he considered the voice he used to be his voice, and had no desire to change it.

I also read some weird teardown of all of the chips and technology used to synthesize that voice a while back and it was very interesting. I'd like to read it again and archive it.