For my main blog [1], I manually update the feed.xml, on my „micro“ blog [2] I have a cron job doing it.
With Hey Homepage, I also built-in the RSS reader. I'm following a lot of 'dev blogs' that I find here on HN. I'm now in the process of curating an automatic newsletter for myself out of all the feeds I follow (752 feeds and counting, although I should remove some).
My dream goal is to make this more interactive. I would love to be able to shoot simple messages to other websites and thank them for their content or add something to the discussion (just like happens on centralized HN here). If I for myself can get rid of Big Tech as the middle man between my website and others, I would be really happy. Right now, I use simple comment forms under my post, but I soon found out what the boundaries are for decentralized software like this. Still, I think RSS has way more potential than it is used for nowadays.
This goes for news sites as well. I used to subscribe to the RSS feed of a local news site, for example. At some point they turned it off. I haven't been back to that news site.