no need to delete the flesh, just make living backups. Monitor them for "dangerous" thought like we do with LLM. Can run them in various environments, have them interact with "aliens" etc Most interesting would be the amount of variety in isolation, you know, the large mostly empty galaxy with everything impossibly far away. They can check out 1 or 2 planets and some moons to prevent excessive boredom in the later stages, if they are some how late extincting themselves. You get that kind of outliers if you run a lot of trials.