Earlier quoted context omitted.
No, people just assume that they don't have one due to no RSS icon. `/feed` slug is standard for finding feeds these days. Equally, why not just use one of the many FOSS tools to scrape sites that don't offer RSS feeds and DIY your own? This is a long-solved problem; RSS remains wonderful.
I love RSS. I actually believe that it may become more relevant in the future, now that AI is so good at producing noise. It will be more and more difficult to make a Google/DDG/Kagi search and spot the autogenerated crap. So maybe it will be time to manually select blogs/websites we like and trust. And RSS is amazing for that.
Still one of my favourite things to emerge on the net. Especially being able to filter through feeds!