Olkiluoto-3's budget also overran a lot to reach 11b. It's also an extra reactor at an existing nuclear plant so perhaps that somehow reduces costs, and it's built by a very established company.
Now, on the other hand, as far as I know NuScale never built a commercial reactor before... so we'll see how many of their current projects actually come to life.
Olkiluoto 3 was a first of a kind project too. Was built by an established company, but one that had been on a decades long hiatus in building nuclear power plants.
Not to go into too much detail, since my SO that worked on the project might otherwise get into trouble, but some of their cost saving measures simply turned out for the worse. Several core components of the reactor had to be entirely removed and rebuilt from scratch because they tried to cheapen out.
Similar reactors built after this will not have these growing pains.
No. The last reactor delivered by the French, before Olkiluoto-3, was Civaux-2 and it was delivered in 1999 (work started in 1991). Work on Olkiluoto-3 started in 2005.
Now, on the other hand, as far as I know NuScale never built a commercial reactor before... so we'll see how many of their current projects actually come to life.