ZD…
I am aware of migration patterns
Many could not afford the passage all the way to America
Many could not get visas for the US
Many who lived in the eastern fringes of the Austro-Hungarian Empire headed for the capital, Vienna
My eldest SIL is a child of a father born in Vienna to parents who migrated their from southern Poland which was ruled by the Habsburgs/ The parents had been refused an American visa. SIL’s mother was born in Warsaw, but was lucky enough to get a visa for the US in 1923 before the immigration shutdown of 1924.
Warsaw had a higher percentage of observant Jews than Vienna, which had many adherents of the German Reform movement.
BUT, in the 1930s when the Germans moved in all Jews were considered the same