I travelled by night train from Budapest to Zurich last night.
I had to change my plans because the train was fully booked on several days, which may occur in the summer, or around Xmas, but is quite unusual for this time of year. I never imagined that there was any connection to the Ukrainian situation though.
When the train did turn up it was quite a bit longer than usual, with the extra cars being Swiss day coaches, so not exactly the best way to travel over night. The train was not completely full but I would say pretty close. I was surprised to see the Ukrainians were not travelling with much baggage so I presume they had to leave their homes in a hurry. There were lots of families with young kids.
On arriving in Zürich there were still some but less than there had been in Budapest so I assume many must have got off at intermediate stations. There was no visible welcome committee or anybody to show the way or tell them what to do, so I guess they must have made their own way and were maybe being picked up by family or friends.