I've heard so. I think my first DB train was around 2019, it was another ICE from Berlin to Munich. They've changed the train, cancelled all seat reservations as a consequence, delayed it for a few hours, I missed my connection in Munich... Maybe I'm unlucky :) E.g. I'm quite lucky with London trains (never had a cancellation/significant delay), but I've heard Cambridge residents would love to have a word with me.