E170/175s are really taking the brunt of this. As I have posted, it isn't always weather related either! Apparently so many EICAS warnings and system alarms have the RA wired into the logic tree of the E170/175 that at Key West with its short 5,000 foot runway, the type is significantly weight restricted on takeoff causing medium distance flights to have to fly over to southern FL airports like RSW, MIA, FLL and PBI to take on full fuel to reach their destination. It has to do with the possibility of a RTO and not be able to completely trust brakes/spoilers due to the RA being in the logic tree. I cannot give you the tech details accurately, so I will leave it at that.