I'm very similar to you, though I think I still have about 50/1000 friends followed. I get maybe 2-3 new posts on my timeline on a "good day". Anyone who posts anything political or vitriolic gets unfollowed. Generally I only see happy things like travel photos, humorous posts, etc.
FB constantly nags me to "add more friends" to see more posts. I love my happy feed. :)
I've recently started putting my photos on Apple's iCloud photo library (both on my iPhone and Mac) and every now and again I'll get a notification from the Photos app saying it's create a new Memory (a collection of photos in a "smart album" put together by their AI).
Has a very similar nostalgic feeling to what you're describing, and a welcome surprise - especially after a long day at work.
To have access to messenger to keep in touch for the people that are hooked on FB. Killing the feed has helped me stop wasting time mindlessly scrolling FB. Sorry, the memories comment wasn't meant to show narcissism but it's honestly the only thing that appears.
FB constantly nags me to "add more friends" to see more posts. I love my happy feed. :)