I'm not trying to sound smug or dismissive, but I don't have much time for deep discussion right now. The question that pops into my mind is this: How many uns

I'm not trying to sound smug or dismissive, but I don't have much time for deep discussion right now. The question that pops into my mind is this: How many unsuccessful languages have multiple long-lived commercial offerings?[0][1] [0] https://en.wikipedia.org/wiki/Allegro_Common_Lisp https://en.wikipedia.org/wiki/Allegro_Common_Lisp [1] https://en.wikipedia.org/wiki/LispWorks https://en.wikipedia.org/wiki/LispWorks