Why is everyone so scared bout the next genrations music?

cause like everyone is scared of scremio and static metal cause ppl have to acept tht music will change from genration to genration but why are u ppl scared. And like the 80's metal is a thing of the past or hard rock the only thing thts keeppin tht genra alive is five finger death punch,disturbed,and slipknot and my genrations music is dieing as well scremo is being replaced by water metal and static metal and I'm not scared of tht music and it's heveyer then screamio why are u ppl so scared of music changing u should acept tht ppl need new things to listen to not the same kindof music all the time like Willam Jennings and Johnny cash they were good music writers but let's face it u don't want to listen to highwayman forever do u srry if this dident make sicnse