A couple years ago, I saw this video about a 87yo who is a ski patroller at Big Sky. His suggestion was to make friends with younger skiers. The 85yo man I met at Taos last season needed to find new ski friends because his friends were no longer skiing as much. He was still in very good shape. He wife has stopped skiing because of RA but was still happy to spend a month in Taos with him.
https://unofficialnetworks.com/2015...-patroller-at-big-sky-makes-us-all-look-soft/
My main ski buddy is a bit older but I don't expect him to slow down for at least another 10 years. Now that he's taking lessons, he could be skiing challenging terrain for another 20 years. In his case, didn't start the lessons until he was over 60. He was an advanced skier in high school skiing every weekend at Aspen Mountain on straight skis. That said, I'm always on the lookout for potential travel mates of any age for trips out west. Still have quite a few places on my bucket list.
As for skiing, I certainly expect to continue to improve for a while. When I was 50, I figured that I had 10 years to become as good a skier as possible. My revised thinking is that I could keep improving well into my 70s. My parents didn't slow down until after they were 90. They worked at staying in shape physically and mentally. They were still traveling internationally in their late 80s and early 90s, although only with a younger companion.