I think there's something to this idea in the article. I remember my childhood well, perhaps because the cast is still somewhat intact, and we all had a good time. The time after finishing school is more blocky: a few years working in certain places, meeting my wife and having kids. My adult life takes up more calendar time, but less "experienced time". My cousin was on a chat last night, explaining that his day is taken up by taking three kids to different schools, then picking them up again. Over and over, but somehow it is one experience. Plenty of people will tell you the same about going to work.

By contrast, you remember things in your youth that happened only once, like spraining my ankle at a crossing with a train oncoming (it was less dramatic that it sounds lol), or going to a music festival, or finishing high school.

One thing that maybe needs to be talked about is that you can simply relive your life. This works best if you had a good time. So the answer to the question is not just that you should look for new firsts, you can replay some old tapes.

I'm lucky enough that I know people from every time in my life. I have a chat group with three other guys that I met when we were 4 years old, over 40 years ago. They sent messages last night. I got a message from my first grade teacher, and my high school English teacher. I have a chat with all my buddies from school, where we exchange messages that are about as mature as when we were teenagers. People I worked with, I keep in touch with.

I have an online photo album that is basically the only data I care to have a backup of. Now and again, I flip through it, and I see what I was up to, and have nice thoughts about that.

It might sound a bit weird for a mid-40s guy to be so resigned to being old. But I was talking to one of the mentioned buddies from nursery, and I turns out the big milestones have happened already. We already finished school, got jobs, had kids. There's a lot of little things to tick off, but they are little things: visiting various interesting sites, going to some concert, and so on.