Nostalgia, yes or no. Thoughts?

Do you think nostalgic thoughts are good or bad for the soul? I'm 62 years old therefor, I grew up in a much simpler time. I often miss that part of growing up. No internet, smart phone, etc., etc. But then again, times in the 1970s was downright volatile, at least in my world and surroundings. I'm wondering how others regard this topic.