I feel rather similarly to you when it comes to fandom, and I found myself nodding my head quite a lot as I was reading your thoughts here.

And I always get to keep some things. Some knowledge, some ideas, some friends I collected along the way. It's never dying, it's just rearranging myself to fit this New Thing in.
~This, so much. ♥ The sentiment behind this is really something I try to grasp too, and I think you described it very eloquently. I hope you will continue to enjoy your New Things as everything continues to adjust around them to fit them in! ♥