...and it's slow to develop or even dream to sometime gain approval for using this for enhancing because of two big side-effects: 1. virus induced immune respon

...and it's slow to develop or even dream to sometime gain approval for using this for enhancing because of two big side-effects: 1. virus induced immune responses gone awry, and 2. cancer - any-time you copy/paste things around the genome you risk knocking off a tumor suppressor gene or turn up the expression of an oncogene (this is basically a show-stopper for Bourne-like largescale genome editing, and if you read about the first gene therapy trials you'll find out about leukemia in patients - even a 1% risk of inducing cancer would be too much, and if you try and do things like gene therapy to slow aging that percent will go up...) Anyway, the point was that a breakthrough eliminating either (1) or (2), that could act like an accelerator or catalyst to the whole field of research, could happen in a military research program and stay "under lock" for decades instead of all benefiting from it as a result of such a worldwide bioenhancements cold-war...