I read the article and found some things in it that were very helpful, and some things that don't apply to me.
Look, I'm not your average Sapiens. There's a reason I went for a life in the arts and was successful in it. Being an artist is, well, different. Artists are an alien species. In a very real sense what you do comes from who you are. So that bit about avoiding identifying yourself with your work, well, that would be a psychotic break for an artist.
I've always been someone who could enjoy being with people and equally enjoy being without them. Were that not the case, working as an artist would not be possible. I've always been that way. That's probably why artists are so good at being bad parents.
I didn't exactly "plan" for a retirement. As a child of Great Depression survivors, I just tried to put something aside, invest, take educated risks, and never, ever, entertain the illusion of stability. For anyone working in the arts, with the possible exception of the administrative end of it, stability and predictability are momentary at best.
Somehow, when the time came I had the means to retire from my career. I'm lucky. The average savings in this country for people at 65 is nothing even close to what they will need.
After decades of being "the busiest person I've ever met" to hundreds of people, I'll be damned to hell if I'm going to enroll in a cooking class to keep myself busy or to meet people. I might do it if I want to learn some techniques, but not to stay busy. I WAS busy. Right now I'm enjoying not being busy. I recommend the spiritual benefits of laziness.
I'm enjoying having my own little home with the possessions that have some meaning for me, like the dresser in my bedroom that I bought at an auction in upper state Vermont while I was shooting on location for Something Wicked This Way Comes, or an Art Nouveau lamp that I bought in Scottsdale after winning a national competition in realist painting, or many other items that recall a quite varied life.
People tell me that I ought to travel. I did travel. In the course of working on films I traveled to a lot of states in this here country and always made time to investigate my surroundings. I made several trips to Canada to work on films, and to do some roaming around. I spent several months backpacking around Western Europe. Right now I want to have my Dorothy moment and enjoy my new home in Oregon. I've already been to Oz.
These days, a lot of my time is taken up with exercising, doing PT seven days a week and hitting the gym for a couple of hours a day 3 days a week.
I'm doing a bit of writing and some reading and I'm getting caught up on some of the TV and films I didn't have time to watch over the past several decades.
As for predicting the future, it's not ours to see, que sera sera. Having never known stability, nor security, if I croak out without having "maximized" my remaining time so be it. It will just be another deadline I met.
I will add one thing that didn't appear in that article. If you haven't done a will, or set up a trust, assuming that you want to leave something to your loved ones instead of probate court and a bunch of vultures, get on with it.