For what it's worth, I'm not suggesting using breeder reactors as a primary source of electrical power, but as an option for reprocessing transuranic waste and spent fuel. So totally different levels of scale.

Also, the main reason we haven't invested in breeder reactors is that it turns out uranium isn't actually scarce enough to justify it.

Oh but you have to use breeders (or perhaps sea water uranium extraction) for a global nuclear-powered economy. Burner reactors run out of sufficiently cheap uranium in less than a decade at that scale. That pesky "scale" thing again.

That doesn't mean every single reactor needs to be a breeder reactor; it means you have a small number of breeder reactors, which we've done over half a century ago.