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True enough about the "busy/crowded" traffic level at BWI...
HOWEVER...
There is a lot of inherent possibilities woven into the multiple-crossing-runway design of the field.
The approach pathways are built to circumvent DCA and IAD (Dulles) to the south -- and bumped up against PHL to the north....
Ergo...
Local controllers have to accept and release traffic from BWI on several rhythms that extend well beyond the field boundaries (spelled - "distracted")...
Throw in the "angles".. and the "mix" of the bigs and the commuters, the corporates and the small general avation users...
My honest and professional [retired "bigs"] opine...
Barring major investment and improvements in the eastern seaboard corridors...
It's only a matter of time...
BWI is in the middle of the air traffic "combat zone"
(Everything North from RIC- Richmond, VA to PWM --Portland, ME.)
"Let's be careful out there..."
--Sgt Esterhaus