A lot of bits in that article sound weird but on the whole the traditional retire-at-65 concept is definitely fading away. I think it underplays how much of that is affordability (how many people even think they’ll be able to retire at 65?) but even then I’m seeing friends take long breaks from work regardless of retirement, I’m seeing people work less traditional jobs that they can find different fulfillment in, and I know a rare few who are past retirement age and asked if it was okay to keep working because they love what they do.
I’m personally planning on retiring at 55 when my pension hits the point that it can easily support me, even if another decade of work would grow it further. Who needs money when you have another decade of healthy life? As we learn more about longevity and aging it’s looking more like I’ll have more healthy years ahead of me than any of my grandparents did and I may as well use them.