Not everyone had the opportunity to experience those weaps the first month, plus while I don't intend to try to keep a specific legendary forever, I believe there should be options to keep weaps relevant. It is future sci fi. Whether it should be as easy to ascend them is a different consideration. Also, should only legendary raid weaps fall into that category? Personally I'm only really concerned about armor relevancy over time as it allows for greater individuality and expression in character look. Prior to ascension too many folks looked the same...