Has anyone here been discarded?

I’ve read a lot of posts and it seems like most people are currently still involved with their narcissistic parent, or were the ones to initiate the no-contact with the parent.

I (29F) and my only sibling (24M) were discarded early this year by our covert narcissist dad. I knew then and now that it was a blessing in disguise, but it just felt like it came out of nowhere because our relationship was very casual at that point which was how I enjoyed it the most.

Don’t feel like going into the story, but just wondering if anyone else is in the same boat. I was initially emotional when my dad sent his “goodbye” text, then I barely thought about him for like 8 months, and now I’m starting to feel angry and I’m not sure why it’s resurfacing. Ugh!