Travelers shall be aware that punctuality (< 6 mins late) of Deutsche Bahn long-distance trains is down to 52 % in November. Only 74 % reached their destination within 15 minutes late.
Recommendation is to consider this in transit times between different train connections and in reaching flights.
Source: https://www.deutschebahn.com/de/konzern/konzernprofil/zahlen_fakten/puenktlichkeitswerte-6878476
(tab "DB Fernverkehr)