I suppose it depends on how complicated the logic is behind your conditional HTML. If there is an initial JS payload that checks the screen size, I might still

I suppose it depends on how complicated the logic is behind your conditional HTML. If there is an initial JS payload that checks the screen size, I might still try to get an HTML string back from the server after checking the size. But there are certainly diminishing returns to server-side rendering if you're making multiple HTTP calls anyway.