The danube swabian assimilation started in the 19. century, when the magyarization happened. Before that we can talk about "pure" danube swabians, but after that definitely not, and we are talking about modern populations. My mom came from a danube swabian village near Budapest, and he is half german half hungarian, i visit my grandmother too very often and local danube swabians are mixing with hungarians as well.
Who were the original danube swabians? Catholic germans from Austria, Bavaria, Baden-Württemberg, Rheinland etc who migrated to central parts of Hungary, it was just a generic name for these various germans, used by hungarians. Teutone as catholic german, would be danube swabian here because danube swabians are descedants of catholic germans who migrated here and Teutone would be in this category. And no, there is no time limit of this german migration, because its continuous until the present day:
https://www.youtube.com/watch?v=BG7x7IG3i5Y
After a while they will identify themselves as danube swabians (just like in the past) because everyone use this word for local germans. And nobody will ask that "when you family came to Hungary? Not the 18-19. century? Hmm sorry then you are not danube swabian", nobody will say that. My father was 100% bavarian, he was born in Germany and everyone called him danube swabian in Budapest, later he started to identify himself danube swabian. My majority german ancestry is bavarian, so i can't be danube swabian because of it or my father side is a new generation german migrant? Bullshit, i'm danube swabian as well, because this ethnicity is different from others, because we were always descedants of verious german migrants, and we were always mixed with many different german roots. An average danube swabian is 1/4 austrian, 1/4 bavarian, 1/4 other german and 1/4 hungarian. And nobody said that every german was danube swabian in the historical Hungary, but if someone migrated to the central parts of Hungary, they became danube swabian.
Someone mentioned folk songs, danube swabian dialect etc, do you guys know how many danube swabian can speak the local german accent?
NOBODY, except some 70-80 years old people. I also know just some word, thats all. Everyone use Hochdeutsch. So these things are not conditions to being danube swabian. As i said 99% of danube swabians can't speak the local dialect, hard to belive that danube swabians from Germany or USA can speak it or they feel any togetherness with this land. And im not talking about these 80 years old grannies and grandfathers who live in these countries and remember for Hungary, but the rest of them has no any such identity, but they were assimilated into the local german community.
And i don't feel mysef as "tragic remnant", its insult. We are the ones who keep the german culture in Hungary, we eat the stifolder, drink the günzer wines, we are going on a trip in Pilisch, Balaton etc. These "real" (lol) danube swabians from Germany has no idea about these things, except some older. I think they are the tragic remnants, not us.