Actually, you can make an RSS feed user-browsable by using JavaScript instead. You can even run XSLT in JavaScript, which is what Google's polyfill does.
I've written thousands of lines of XSLT. JavaScript is better than XSLT in every way, which is why JavaScript has thrived and XSLT has dwindled.
This is why XSLT has got to go: https://www.offensivecon.org/speakers/2025/ivan-fratric.html