Yeah Artemis, in a sense this forum has partially "outgrown" threads like these which ponder imposter-replacement vs. mere plastic surgery on the same individual, but it's still true in my opinion that not everyone gets doppelgangered and more so for minor or niche-fame people, and people who have exceptionally advanced talents which cannot duplicated. Unlike say, Hollywood actors or top level pop/folk/rock musicians who can, er, strut, mimic, memorize lines, sing, strum guitars and bang on drums.
As opposed to being a niche-fame, virtuoso classical music performer, like say, Yuja Wang. Someone who has real, rare ability. Despite her/their coming across in interviews as kinda being a Rihanna/Eminem-loving airhead.
But it turns out that this too is an illusion. As was snidely illustrated in a full page, photo-filled New York Times article last year, which proclaimed that amazing classical music artists are now "a dime a dozen" including violin and piano prodigies. All quite common these days.
How many Asian women performers in the world can now play the fastest and most difficult Prokofiev and Rachmaninoff piano pieces as well as Yuja Wang? It turns out: dozens, maybe hundreds.
Google Claire Huangci, for example, and see/hear. She plays on the level of Yuja Wang/Fuja, is about the same age, but she is nowhere near as famous.
My point is: even people that one might think would be impossible or nearly impossible to replace can be replaced just like people of much lesser instrumental skill like Paul McCartney, John Lennon, Mick Jagger, Bruce Springsteen, Joan Baez, Bob Dylan etc.
Quite an interesting interview here. The professor seems to be a sly whistle-blower and dropping doppel-clues all over the place:
www.youtube.com/watch?v=vrzd08U4x0A
....