> one problem is the difficulty of measuring what we are talking about: when is a language "dead", when the last program in production stops running? when the l

> one problem is the difficulty of measuring what we are talking about: when is a language "dead", when the last program in production stops running? when the last programmer that can program in it retires? when the last school that is teaching it removes it from the curriculum? or maybe when the last computer scientist that can enhance it decides there are richer academic and/or commercial pickings elsewhere? When no company willingly starts a greenfield project written in this language.