Ah

I see Deutsche Bahn has taken to behaving like a night train startup and started drawing lines on maps - for a sort of dream 2050 high speed network

https://www.deutschebahn.com/de/presse/pressestart_zentrales_uebersicht/DB-legt-Studie-zum-Ausbau-des-Hochgeschwindigkeitsverkehrs-in-Europa-vor--10878404

Sure, aim high. But there's not a hope in hell this comes to pass given current politics. I don't think DB can even deliver on the bits of it that it'd have to deliver on