Not... really? I say that given nostalgia doesn't really exist for me, since everything that I could feel any nostalgia for is still definitely still here for me as an adult, or it's better than ever (note, I was born in 1990, so technology in particular is WAY more fun & diverse now). I can still have summer fun with my friends, I can still play X game, I can still watch whatever show... etc. The only thing that isn't the same is my health, & I do miss my grandmother because I took that for granted, & I regret that. I'm also very, very not nostalgic for who I used to be as a person (bad) & now I have total freedom to be who I want to be in regards to my gender, so.
That & the older you get, you realize how little autonomy you really had as a child, between parents & school obligations. Even summer break was usually still slammed with homework, or whatever. The moment I had any "free" time, I'd have to be "working" anyway. There's a semblance of having all the free time in the world & freedom as a youth... but not really. There was also just a ton with bullying. The older I get I realize how much I am not nostalgic for those times where I had to listen to other people dictate how I could use my little free time (parents disapproving hobbies, travel, banning friends from coming over, etc.). Games & things seemed "better" back then, but not really, because none of it was my own income at that age & could be taken away from me in an instant if my parents suddenly found something to be mad over. One thing I also like FAR more as an adult away from anyone else is that I can invest in collectables & electronics away from smokers. I had no idea how much that in particular destroyed everything I owned back then, & I couldn't just tell my parents not to smoke & destroy my stuff. I never realized how disgusting it was until I found my old model kits with a literal sticky layer of smoke tar over the plastic, which would never come out.
And additionally, there's also nothing stopping me from enjoying everything I did as a child, but now with more freedom & my own income to really invest in what makes me happy & when. If I want to drop $300 dollars on Tamagotchi & have cake for dinner, I can now, ahaha. Dunno. The past just isn't nostalgic for me personally since everything I loved as a kid is simply still here or better than ever. I'm nostalgic of some old times with friends, roleplay & old websites, but really, I can just find new sources of that & enjoy it better now? FREEDOM. That said, I am happy to be running a blog for vintage LCD toys as an adult & loving every minute of it now with that freedom.