Some folders I follow with devotion (niche tech things where I want to keep tabs, environment and health, media scrutiny blogs). Others, (like MSM) I follow with half an eye.
I need to go through and prune the others and organize them by topic. I'll soon add in feeds for various YouTube channels I want to keep updated on without checking the unreliable and tedious Subscriptions feed on YouTube.
The main feeds I've been checking over past months are related to publishing and self publishing, software development, services I like, games I'm interested in, VR developments, and creators I enjoy.
Samuel Pepys Diary - now over a year into it. Feed aligned with weekday and approx date.
Ian Visits - great serendipitous resource for Londoners.
However the vast majority of these are low-volume, many are probably dead (even the ones not explicitly unhealthy).
I get roughly 1k new entries a month.
One exception is my "Background Videos" category which I get a bit more than I watch. I also probably delete half based on just looking at the title. They are mostly speedrun videos that I play while doing light work. I am currently watching videos from January and falling behind a little. But It is easy to both get more selective in the ones I watch and clean it out if I get way too behind.
Like most people.
Good luck.