Going back to dual nationality, I left the US when I was almost 50. I don't want dual nationality. To be honest, I'm not sure I could vote in German elections honestly. By that, I mean that I'm not sure I could vote for what is best for Germany without thinking about what is also best for the US at the same time.
Having married a German at the advanced old age of almost 51, I would like to have a permanent Aufenthaltstitel without having to renew every 5 years. Sadly, I will never be able to pass a B1 test. Between my age and what was a minor, insignificant problem back home*, I can't get beyond A2 German. I probably couldn't even pass the A2 test, even though my practical German is A2. So there I'll be in another 20 years, 81 years old, having been in Germany for 30 years, going in to renew my stupid temporary Aufenthaltstitel.
*some kind of processing disorder, the kind that makes me hear song lyrics all wrong, like "I can see clearly now the rain is gone. I can see all popsicles in my way." Or when a song called "Perfect Heartbreak" was on the radio, I swear, I heard "tangerine heartbreak." Loud places are awful for me, because I can't pick out a single voice, but it was never a problem in school. Trying to pick out words when people are speaking to me in German? Almost impossible, even after 10 years. I'm not stupid. And I work at it. It's like asking a person with no legs to do the high jump. I can only sort of bounce.