Comment by josefx

> Maybe I've just been lucky so far,

A lot of the issues are local, some are time constrained. There is a CCC talk on youtube "BahnMining - Pünktlichkeit ist eine Zier (David Kriesel)", that concludes that any train traveling through certain trainstations will most likely end up significantly delayed. Then you have certain train models failing during summer. Or my recent favourite planned construction work with no apparent plan for a reliable replacement service beyond "here is a train, it might leave at some point".