No, Ramstein and Spangdahlem air bases are still open as US facilities, although I think Ramstein may be a joint USAF/RAF/Luftwaffe air base. I’m not sure on that, I just remember seeing an article that showed a picture labeled the “British and German co-commanders of Ramstein” at a WW2 memorial function.
Talked to a neighbor who was a major in the Army. He said that as of now, he thought that there were some 20 US military bases left in Germany. Said he could find out for sure, but...
Anyway, asked me why I wanted to know and I told him. He agreed with our thoughts since the cold war is over, and being that Belarus and Ukraine are not part of the old Soviet government, that we should move closer to the front lines, so to say.
He said, in his opinion, that Germany has never been our friend, even after we re-built them after WW2. Unlike Japan, who has become one of our closest allies in the Pacific.