> fast reactors yield waste products that principally live only a couple of hundred years.

Hundreds of years is not acceptable. Humanity is not able to handle projects spanning hundreds of years time. Look at the Zaporizhia atomic energy site for an extreme example of what I mean.

The problem is not just the time scale either. There are other areas humanity fails at time and again.

P.S. Thank you nevertheless for pointing out several advantages of fast breeder reactors.