Unfortunately, RSS has become less relevant when compared to other popular platforms made by "Big Tech". But I've been using RSS for over a decade now as a window to everything on the internet and I haven't missed a beat. Subscribed to Ebay listings, Instagram, shopping sites, podcasts, blogs, etc--virtually any internet content I'm interested in on any website, all without any flawed algorithms or ads. Site's like rss.app and openrss.org make RSS pretty easy to use now compared to a decade ago. I'm pretty enthusiastic about the future of RSS.
I'm a big RSS user so I'm sorry to disagree with your optimism.