If you almost scrolled past this as another EU PDF drop, here is the part that matters: the EU did not open-source a conclusion. It open-sourced the right to argue with it. That is the most valuable part of the TYNDP 2024 public files, not a live system test. [C002]
Most people hear "open tools" and think: great, now I can see the official answer. The more important shift is the opposite. You can inspect how the answer was built, where the assumptions sit, and where to push back if you think the plan is wrong.
That is why this release matters. The TYNDP 2024 download set includes the consultation summary, all answers received, modelling methods, a reference grid, PEMMDB 2.5, PECD 3.1, and model outputs. That is not PR material. That is rebuttal material.
The legal backdrop sharpens the point. Regulation 2019/943 says this Union-wide plan must cover network modelling, scenario development, and resilience assessment, and that the consultation files and meeting records must be public. Less "trust us," more "check our work."
"EU Open Sources Ten-Year Network Development Planning Tools" [C001] is the headline. The usable takeaway is simpler: a release matters when it changes your next decision. Save the data room, not just the summary page. Share this with the person who only reads the headline.