'new' nuclear energy facilities in UAE, South Korea and China have been delivered on time and on budget. It really depends on stability of political support and maturity of the supply chain, as hinted in the article "“One of the first reactors would more likely take 12 to 15 years,” Romano said."

The problem with "We need to move away from fossil fuels NOW" is, that the world is currently not moving in this direction, as you can see from the annual CO2 emissions statistics.

https://www.iea.org/reports/global-energy-review-2025/co2-em...

We need all the low-carbon technologies and nuclear power is a long term low-carbon technology.