I'm a JS dev working with some relatively large institutions building single page web applications using JS frameworks. Unfortunately I have seen there is often an unwillingness from both management and some developers to invest in server side rendering of SPAs. There is always a willingness to support users who have visual or other accessibility requirements, yet users who want or need to disable JS are often left out in the cold.
I love JavaScript but I still believe it is important to provide alternatives for those that don't.