“All “Litvishe” today are either full blooded Hungarians, Romanians, Yekkes or a mix. Almost all minus the Yekkes and Oberlanders shtam from Chassidim. They just learned in “Litvish” yeshivos.
But real blue blooded “Litivise” barely exist. Same with the Poilisher. Almost the whole Ger Chassidus hails from Hungary etc.”
The Yekkes seem to have almost/mostly disappeared over the last 35 years. You barely see any Yekke bochorim wearing a Talis, whereas in ’80s and even in the ’90s you saw a lot of them in shuls all over the place. They seem to have mostly merged into the Litvish/Yeshivish world.
As far as Oberlanders, a huge portion (perhaps most) of prewar Hungarian Yidden WERE Oberlander. Over the last 35 years a huge portion (most?) Oberlanders started identifying as Chasidish. Look at Vien (where their Williamsburg Beis Medrash switched from Nusach Ashkenaz to Nusach Sefard just in the last 15 years or so) where their Rov now is referred to as a Rebbe and wears a Shtreimal, as do the vast majority of Vieners. Also look at Matersdorf/Yeshiva Ch’san Sofer. But a significant portion of Oberlanders also started identifying as Litvish. There are still a few who still identify as Oberlanders proper.