In this video, long about 48:00, Eliezer talks about uploading and about how it wouldn't be murder if his meat body were anesthetized before the upload and killed without regaining consciousness.
It's arguable that it wouldn't be murder, but I'm not clear about why Eliezer would want to do it that way. I've got some guesses about why one might want to not let the meat body wake up (legal and practical complications of a double but diverging identity, the meat version feeling hopelessly envious), but I'm not sure whether either of them apply.
On the other hand, I can think of a couple of reasons for *not* eliminating the meat version-- one is that two Eliezers would presumably be better than one, though I don't have a strong intuition about the optimum number of Eliezers. The other, which I consider to be more salient, is that the meat version is a backup in case the upload isn't as good as hoped.
More generally, what would folks here consider to be good enough evidence that uploading was worth doing?
I assume that in the hypothesis in which Eliezer was speaking, the upload is then a safe procedure, not an experimental one. And anyway you can sedate the living body, do the upload, check that the upload went well, and then destroy the carbon body.
Whatever your optimal number of copies of Eliezer it (be it 1 because split-heads of personality creates too much problems, or 2^42 because you love Eliezer so much), if an upload is significantly better than a carbon version (which I assume too), then it would be better to get n upload versions and still get rid of the carbon one.
If carbon and upload versions have different pros and cons (like some senses not yet well implemented in the upload version), it could make sense to keep both. But in the long term, I'm pretty sure the upload version will be much better, and keeping a carbon version wouldn't make sense.