I mean, it's better than having to maintain both server- and client-side logic and state (and having to sync all that), and definitely better than the days where we also had to manage DOM diffing manually.
But I still get headaches from the NPM/node ecosystem, the build steps, having to decide whether logic goes on the client, server, or both, and to some extent javascript itself. And you can never fully let go of the server-side of things.
I'm very intrigued by the alternative idea of moving (almost) everything to the backend, and maintaining the dynamic bits by sending all events to the server and sending back diffs based on that which update the page. Phoenix'/Elixir's LiveView made some great progress in this area, and from what I hear other ecosystems are experimenting with the same thing.
It's not a panacea: if you need offline functionality you're gonna have to deal with js and everything that comes with it. But in many projects that's not a deal-breaker, and in practice the approach actually leads to smaller payloads sent between client and server, and significantly simpler codebases.