If you find this kind of thing interesting, here's Poland's vice-minister responsible for railways bragging that #PKPIC is apparently running the world's heaviest and longest 200 km/h train in the world that isn't multiple units, at 877 tonnes and 390 m (EU200 + 13 cars):
https://xcancel.com/PiotrMalepszak/status/1946488568722964676#m
VagonWeb entry: https://www.vagonweb.cz/razeni/vlak.php?zeme=PKPIC&kategorie=EIC&cislo=1540/1&rok=2025