I find XSLT removal a rather bad argument for "browser vendors bad". Browser vendors do of course make bad decisions that impact people to serve their own purposes, but in this case the "people" in question are just bloggers who want their RSS feed to render pretty on the browser, which isn't all that consequential and makes the whole discussion look like frivolous outrage. There are probably way better examples to lead with.
Edit: You don't need XSLT to style your feeds. I've been using a script that does the same [1], because browsers will read and run XHTML <script> tags inside any XML document.
Ahh, is that it? I was wondering what on earth XSLT had to do with the RSS feeds as alluded to on the .rip site.
Google can do literally nothing to disrupt RSS since its only important use is in real feed readers, which Chrome isn't.
Surely free-tier ChatGPT can in 5 minutes make a replacement that you could use to parse an RSS feed and render whatever you want. I guess it wouldn't be at the exact feed URL, though the server could use User-Agent to cheat at that, probably.