I remember from my interrail planning that big parts of Europe are not nice to visit due to too slow trains. I heard EU wants to fix this though German train d

I remember from my interrail planning that big parts of Europe are not nice to visit due to too slow trains. I heard EU wants to fix this though German train delays are not a big blocker because you normally plan a whole day train travel to go from A to B and being one or two hours late is not too bad.