Epigenetic reprogramming is very dangerous, but also very, very promising. If we can do this right, all kinds of regenerative medicine become possible: blind people seeing again, crippled people walking again, people with heart failures running again etc.
Altos Labs (recently co-financed by Bezos to the tune of some 3 billion dollars) has several scientists specializing in reprogramming, including a Spanish scientist who was able to reprogram living mice without causing any tumors.
