"issues with Javascript today is the idea that we have to keep learning the latest technology and keep using it. " I don't get it. Why? For ISV it's the produc

"issues with Javascript today is the idea that we have to keep learning the latest technology and keep using it. " I don't get it. Why? For ISV it's the product that matters. ESP:s might as well invent filler to charge the client but what does it help in creating a product with JS to run after the bleeding edge? Usually we pick up a language and toolset, write the product with it, and if there are bugs that absolutely need to rearchitect some foundational things then then, only then is it worthwhile to ponder if some basic technical constructs need a major overhaul. This "update to latest hot as you go" sounds like velocity is lost in trying to adapt to some new gimmick for no benefit. Obviously there is some cost/benefit tradeoff here I'm not getting. What is it?