Both were very good rounds in my opinion, the 243WSSM being a near ballistic twin of the 243AI and the 223WSSM being the fastest (or very, very nearly) 22 caliber round ever made.
I think their demise may have had something to do with the shutdown of the New Haven facility but I'm not sure.
Still happily answering to the call-sign Peetza.
The problem, as you so eloquently put it, is choice.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.