I get the longevity angle (even if I think it’s not possible or even desirable) but digital twin I don’t understand. It’s like a different person altogether. Even if it was possible to completely clone a persona digitally it would not be you but someone else.

Much like grooming a natural heir, you can hope that someone will keep your legacy going, make decisions you would make, run your business, and so on.

I can see it as a rational strategy if you're worried successors won't be up to the job.

I totally agree with the ridiculousness of it, but that's not going to stop people with outsized egos from trying. Or companies that are trying to ride the coattails of a cult of personality.