Berlin is usually considered the fastest of the majors. Many world records happen in Berlin. In fact, Eliud Kipchoge set the world record in 2018 when I ran it! (Then he set it again in 2022, then Kelvin Kiptum set the current record in Chicago)
Funny story—Berlin was my worst race. Maybe I was having too much fun beforehand? Taehyung feels like he would fit right in, whether it’s having too much fun or setting world records. He can do both.