Being born late 1984, the 1990s have some amount of nostalgia for me but not much. Like others have already said, the 2000s are where I get nostalgic. Towards the end of 2003 I discovered the joy of railways, and while still very immature back then (which makes me cringe when I think back!) I do kind of miss the early-to-mid-2000s. It was a very different time, without social media and online presence possible everywhere. Mobile phones were basic, but would hold charge for days on end.
Stuff like that I do miss, but I absolutely don't miss being in the dark with train times and running information, for one big example. Things like Real Time Trains has been incredibly useful, an absolute game-changer for things like a full day out on a rover ticket for one example. Other things I wouldn't want to go without now, which if I'd had 20 years ago may have led to me having a completely different lifestyle:
- GPS on smartphones, and the ability to keep track of one's activity in apps like Strava, MapMyRide etc.
- Huge mobile data allowances, meaning there's no need to keep checking how much one has left. My first smartphone had an allowance of just 250MB of data per month!
- Easy access to things like online maps for free, and the ability to download digital OS maps for a fee. On a related note, being able to use said free maps to have a search around an area to see what's there before visiting and not getting bowled out by a lack of shops/opening hours
- Being able to take photos/video without the need for separate equipment. I don't miss that at all, I get oddly nostalgic sometimes when I see disposable cameras in Asda and I remember how commonplace that sort of thing used to be, but I couldn't go back to that now.
- Similarly, being able to access music without the need for extra devices like portable CD players, thanks to services like YouTube, Apple Music and others. I don't miss things like having to make sure the CD player was on a flat surface, or having to carry spare batteries with me for my devices, or indeed planning in advance what music I wanted to play during a trip!
There's plenty of other things I don't miss, but I still remember the 2000s with some nostalgic goggles. Now I'm pretty much middle-aged, and while there's so many good things going on now compared to back then, I have fondness for the days when I was still naive and had a lot less concerns etc.
Not that I'm saying everything is bleak now, far from it. Personally, despite not being where I want to be with physical health, I'm not far from it and I have plenty of opportunity to sort that out. Back in the 2000s, I was far from fit and I led a pretty sedentary lifestyle. The end of the 2010s saw that finally change, and the early 2020s have been hugely dreadful for many things but it has also been when I took more steps forward to being an improved version of myself, and there's still more to come
In short, nostalgia is great for a bit, you know when you're feeling it and go 'Oh yeah I remember that, wow things have changed' etc. However, I much prefer to live in the here and now! Things are getting better and long may that continue! I cannot imagine what the world would be like if recycling was not as big a thing as it became. I cannot imagine how bad the world would have become if we'd not started being much more environmentally friendly in general, if society as a whole never moved forward with public health concerns.
Personally, right now I'm looking forward to reflecting on the 2020s when I hopefully reach the 2040s. If in 2043 I can look back and think 'yeah, it was a good era, but wow we are so much better off now' then I'll be happy.