@Uilebheist @feorag on the Italian side right now the line is completely closed between Chiasso (CH) and Como (IT)
so any delay or disruption is evidently the fault of the foreign operator, not SBB/CFF/FFS
(on a more serious note: the official warning from the swiss operatori sbb.ch/en says “Road and rail traffic has been severely affected. Travellers who do not have to travel to northern Italy urgently are not advised to travel. Rail services on the Chiasso–Milan Centrale route have been suspended and no rail replacement buses will be running between Chiasso and Milano Centrale. Passengers travelling to Italy should travel via the Simplon route to Milano Centrale instead. Please note that there may be capacity restrictions on the Simplon route. Service will last until 23 September 2025, around 11:59pm.”
(to be fair, the other commuter lines between the lower Tessin and Lombardy seem to be running, but there is no direct connection to Milan, they require at least one change)