whether client-side rendering exposes alternative content really depends on how the code is actually written. i could still send different data depending on the

whether client-side rendering exposes alternative content really depends on how the code is actually written. i could still send different data depending on the type of client. but i agree with the general point. i actually used that server-side approach to achieve something like that on an old site. that was before client-side rendering was a thing. i had sections of content that by default were folded, so you would only see the headline had to click and load a new version of the page with the content open, but for a search engine the server would serve the page with all sections opened and none of the headlines clickable.