It’s not steady traffic. It all comes in and goes at certain times. 1 local, 1 ground. You could have arrivals to 3 runways while launching departures off 2 or 3 and hitting slots. There’s not a lot of room for ground to work with and our parallel taxiway situation sucks because c is so close to the terminal, pushbacks block it. Every place has its quirks and STL is no different. Most people who wash just think it’s gonna be cake and give up when they realize it’s not.