Interesting. But of course there is a lot of investment bottleneck (or whatever the translation for „Investitionsstau“ is). For example take the „Neue Alpentransversale“ [1][2] which was a 40 year project for modernizing the tracks through Swiss with connections to all neighbouring countries. The Swiss are finished. Germany did not even start and will be ready around 2040, for just 190km of tracks.
