When European countries, united in ESFRI (European Strategy Forum on Research Infrastructures), agree that a research facility is of great importance for science, the plan for such a facility is placed on the so-called ESFRI Roadmap. This is a European priority list in which the scientific community indicates which projects are the most important. As such, they are also the projects on which science money would be responsibly spent. European scientists and ministries decided in 2021 that this project would be on the European Roadmap and should be brought to realisation within 10 years.