The over provisioning could be considered more of a feature than a bug, offering new economic periods where the marginal energy cost of production go negative at times.
??? Like 4 days of downtime per year?
I've had about 1.5 hours of outage this year, which was an outlier (much more outage than normal).
3 9's is typical if you have above-ground utilities. If you have underground utilities, you may be doing far better than this...
Over-provisioning has a cost. If it is required to achieve characteristics required to do a like-for-like comparison, it should be accounted for.
The problem with these Nuclear conversations is that people are pushing their preferred option, always without coming to some sort of agreement on what the requirements are for the power generation option. Without agreeing on what needs to be achieved, everyone talks past each other, arguing with straw-man solutions.