The legacy of that empire (it was purely Austria only after 1809) and of Prussia was quite long-lasting though. Because of the medieval Ostsiedlung and rulers granting land and privileges, there once were German-speaking enclaves all over Eastern Europe. A few still exist. Only ethnic cleansing after WWII and Germany enabling them to move away by granting citizenship to them made them disappear.
Some legacy still remains: for economic reasons, German is one of the most frequently learned languages in Eastern Europe.
Some legacy still remains: for economic reasons, German is one of the most frequently learned languages in Eastern Europe.