Nostalgia is a double edged thing. harmless - necessary probably - when kept in its place but mentally and spiritually stultifying if you let it get too strong a grip.
As an example, ive been listening to bob Dylan for close to 50 years - sometimes I'll listen to blood on the tracks and it's absolutely the soundtrack to a bit of my life and puts me back into that moment. But the strength of the music and the lyrics means that I can still hear it anew and extract more juice out of it. the best experiences I have with any bit of music or art is when I hear something fresh, new, inspiring, moving.
i want to remember the continuity of my life and honour the past but I don't want to constantly relive it - that's for tired old folk.
Move on chaps!