We did Budapest-Vienna-Prague a few months ago. At least then, I didn’t notice anything out of the unusual, that hadn’t already been the case for years.
I suspect in the next few years there will be drastic changes, so if you are going to go, better do it now.
In between conferences I spent a few days bicycling around Vienna last spring. It seemed like every school I passed that the children were almost 50% of non Austrian heritage.
Just my own nonscientific personal observation.