It’s entirely possible this is just attentional bias on your part. You noticed the more vibrant, active adults when you were younger because they were more interesting to you.

But generally, things are worse these days, too. I feel like people used to talk about the future optimistically when I was growing up. Maybe people still talk to kids that way now, but I don’t. And I don’t hear people doing it. So, maybe you’re on to something here.