[defrost]

Breeder reactors have no bearing on the costs of primary mineral extraction from the crust - it's a seperate line of discussion altogether to this sub thread.

Perhaps you intended your comment in reply to someone discussing the pros|cons of fuel generation via breeder reactors rath than to my comment which addresses the inevitable rising effort required to extract more resource from the crust (or ocean) over time.

[ETH_start]

The comment you initially responded to was asking about the cost of breeder reactors:

"It might be cost-prohibitive now, but is there any reason to think that it can't get cheaper?"