HN is a great place to gather RSS feeds. Any time there's an interesting site I always look for them. These days I usually see articles that appear on the HN front page a day or so before they hit HN. But HN isn't the only place I practice this. Back in the 2010s it was obvious reddit was going under so I did the same there till 2015. I have 1000+ RSS feeds now and very little need for news aggregators on the day to day (except finding new feeds).
QuiteRSS is an excellent native reader that handles my thousands of feeds well. It is so multi-platform it even has an OS/2 version. https://quiterss.org/
I see two use cases of an RSS reader. You can use them as a stream of news and just dive in when you want, or trying to read every article. I personally do a bit of both, mixing feeds, but with good tagging and filtering.
I do the same - I separate "firehose" feeds that have dozens or more updates a day, from feeds that may update once a month. The latter is likely more important and cannot be lost in the noise of the former.
It is a very small microcosm of how we say we want social media feeds to work (chronological) but why algorithms are everywhere.
I think it depends on the type of feeds you subscribe to. Some big news sites have multiple posts an hour whereas many personal blogs don't post in the average month.
Personally I do more of the latter and probably get less than 10 new items a day (and 3 of those tend to be comics which are quick to read over breakfast).
Often the higher-volume feeds that I subscribe to are filtered by author or category to focus on what I am really interested in.
Most HN sourced feeds are in the "Computing but not spammy" category.
The first load of the big opml into QuiteRSS (if you try it) might take a while. After that it will be faster. I suggest enabling the "load database to ram" option in QuiteRSS configuration.
QuiteRSS is an excellent native reader that handles my thousands of feeds well. It is so multi-platform it even has an OS/2 version. https://quiterss.org/