Thanks for your thoughtful insight. Battery technology for electric cars appears to be on a slow doubling rate but hopefully faster than 20 years. Maybe 10% imp

Thanks for your thoughtful insight. Battery technology for electric cars appears to be on a slow doubling rate but hopefully faster than 20 years. Maybe 10% improvement per year (72/10 = 7.2 years to double then). Kurzweil doesn't say information tech doesn't double every 2 years in general, just I think that it's rate is somewhat steady. It's at least very exciting to think about progress continuing (however it is defined). 30 years to immortality is what every futurist should predict any time they publish a paper, because as an about 50 year old, that feels achievable.