It's complicated, and I think it's less malicious in a way that "kneecapped" implies. Sure, RSS still exists in some form, but I think the utility of it has been in decline, and a lot of 'content' simply isn't accessible by RSS feed anymore.

An argument can be made that they provided an RSS reader service no one could come close to matching and basically dominated the area. Google's deep support also helped it proliferate. It is maybe underrated that RSS was likely one defense the web had against the dominance of walled gardens and social media. It allowed a lot of sites to flourish that I think would not get any traction today.