> we look at Germany trains (and Switzerland trains) as always on time

When taking an international train from Germany to Switzerland, don't count on it that it will run through to the final destination.

SBB (Swiss National Railways) started to block German trains if their delay is more than 15 minutes (so, basically every DB train) and won't allow the train on their network.

This is only peripherically educational. Constantly delayed DB trains completely fouled up the scheduling on the extremely dense Swiss network. So they just won't allow it anymore.

On a sidenote: In 2024 SBB trains were 93.2% punctual. Connectivity punctuality (where you have to catch a connecting train) was 98.7%. A train is counted as punctual if the delay is less than 3 minutes (half the German figure).