Agreed. I still have to come to terms to that myself so I use `decades` not to scare people too much but... also my understanding of the situation and evolution

Agreed. I still have to come to terms to that myself so I use `decades` not to scare people too much but... also my understanding of the situation and evolution is not solid enough to get into an argument about decades vs lifetime so I stick to decades because it can also mean centuries :/.