I feel the same about Touhou music, old stepmania/osu songs, animes, minecraft music, etc. I just accept/enjoy the feeling, it is sometimes sad sometimes enjoyable to remember. im not sure what one should do about it, everyone feels this way over something at some point, and we’ll feel it about the era we are in right now when we’re old. if you liked the experiences you’re feeling nostalgic about, maybe thank God for letting you enjoy them when you did