[kitd]

> If SMRs are cheap enough to act as backup to wind and solar, they are cheap enough to displace wind and solar entirely.

That doesn't follow necessarily. Wind & solar being the most cost effective doesn't mean you remove all backups just because they aren't as cost effective.

[graemep]

Its the other way around. If you have sufficient nuclear to act as a backup, then you have sufficient that you do not need the wind and solar in addition.